Reading Comprehension Identifying the Main Idea 3 — Questions and Answers
Question 1: A passage states that coral reefs support 25% of all marine species, protect coastlines from storms, generate billions in tourism revenue, and provide food for millions of people. What is the main idea?
- Coral reefs are colorful underwater structures
- Coral reefs are critically important ecosystems with ecological, protective, economic, and nutritional value (Correct answer)
- Tourism is the most important benefit of coral reefs
- Marine species cannot survive without coral reefs
Correct answer: Coral reefs are critically important ecosystems with ecological, protective, economic, and nutritional value
The passage presents four different types of value (ecological, protective, economic, nutritional), and the main idea must encompass all of them: coral reefs are critically important for multiple reasons.
Each detail highlights a different dimension of importance: biodiversity (25% of marine species), coastal protection (storms), economics (tourism revenue), and food security (feeding millions). The main idea must be broad enough to cover all four. Option B does this by acknowledging the ecological, protective, economic, and nutritional value. The other options are either too narrow (singling out one benefit) or too vague.
Question 2: Read the passage: 'The village library was more than a building full of books. It was where children discovered imaginary worlds, teenagers found quiet spaces to study, retirees gathered for book clubs, and newcomers learned about their community.' What is the main idea?
- Libraries should have more books for children
- The village library served as a vital community hub for people of all ages (Correct answer)
- Book clubs are the most popular library program
- Libraries are becoming obsolete due to the internet
Correct answer: The village library served as a vital community hub for people of all ages
The passage describes different age groups (children, teenagers, retirees, newcomers) all finding value in the library, supporting the main idea that it serves as a community hub for everyone.
The opening sentence ('more than a building full of books') signals that the library's significance extends beyond its collection. The four examples span different demographics: children (imagination), teenagers (studying), retirees (socializing), and newcomers (community connection). The main idea unifying these details is that the library functions as a vital community hub serving all ages and needs, not just as a book repository.
Question 3: An article discusses rising sea levels, increasing wildfire frequency, shifting animal migration patterns, and more intense hurricanes. What is the main idea most likely being developed?
- Hurricanes are becoming more destructive each year
- Climate change is producing observable effects across multiple environmental systems (Correct answer)
- Animals are migrating to new habitats for food
- Sea levels will flood all coastal cities by 2050
Correct answer: Climate change is producing observable effects across multiple environmental systems
The four diverse environmental changes (sea levels, wildfires, migration, hurricanes) are all symptoms of climate change, making the main idea about climate change's broad observable effects.
When multiple environmental changes are discussed together — sea levels (ocean), wildfires (land), migration (animal behavior), hurricanes (weather) — the unifying concept is climate change affecting multiple systems. The main idea must be broad enough to encompass all four phenomena. Options A, C, and D each focus on only one detail. Option B correctly identifies that climate change is producing effects across multiple environmental systems.
Question 4: A paragraph describes how a new employee orientation program includes mentorship pairing, skills workshops, company culture presentations, and regular check-ins during the first 90 days. What is the main idea?
- New employees should attend workshops
- The company has designed a comprehensive onboarding program to support new hires (Correct answer)
- Mentorship is the most effective way to train employees
- Employee turnover is a major problem for the company
Correct answer: The company has designed a comprehensive onboarding program to support new hires
All four components (mentorship, workshops, culture presentations, check-ins) are parts of a structured onboarding program, making the main idea about the company's comprehensive approach to supporting new hires.
The four elements described are all components of one system: an employee onboarding program. The main idea captures this: the company has a comprehensive, multi-faceted approach to welcoming and supporting new hires. Option A mentions only one element. Option C makes an evaluative claim not supported by the passage. Option D introduces a problem that may have motivated the program but isn't discussed in the paragraph.
Question 5: The implied main idea of a passage must be determined when the author does not directly state it. Which strategy is most effective for identifying an implied main idea?
- Read only the first sentence of the passage
- Look for the longest sentence in the passage
- Examine all the supporting details and determine what general point they collectively support (Correct answer)
- Choose the most interesting detail as the main idea
Correct answer: Examine all the supporting details and determine what general point they collectively support
When the main idea is implied rather than stated, the reader must analyze all supporting details together and infer the overarching point they collectively make.
An implied main idea is not directly stated — the reader must infer it. The best strategy is to examine all supporting details and ask: 'What general point do these details collectively support?' Reading only the first sentence might miss an implied idea. The longest sentence isn't necessarily the most important. Selecting one interesting detail confuses a part for the whole. Only by synthesizing all details can you reliably identify the unstated main idea.
Question 6: A passage discusses how a local park was renovated: new playground equipment was installed, walking trails were repaved, native plants were added to garden areas, and a community pavilion was built for events. What is the main idea?
- The park needed new playground equipment
- The local park underwent a comprehensive renovation to better serve the community (Correct answer)
- Walking trails are the most popular park feature
- Native plants require less maintenance than other plants
Correct answer: The local park underwent a comprehensive renovation to better serve the community
Four distinct improvements (playground, trails, gardens, pavilion) all point to one central theme: a comprehensive park renovation designed to benefit the community.
Each detail describes a different aspect of the same renovation project: recreation (playground), fitness (trails), aesthetics/ecology (native plants), and community gathering (pavilion). The main idea must encompass all four. 'Comprehensive renovation to better serve the community' captures the scope (all four improvements) and the purpose (community benefit). The other options focus on single details or introduce information not in the passage.
Reading Comprehension Identifying the Main Idea 3
A passage states that coral reefs support 25% of all marine species, protect coastlines from storms, generate billions in tourism revenue, and provide food for millions of people.
What is the main idea?