Read the following passage and answer the question.
Community gardens are becoming a common sight in urban areas, transforming unused lots into vibrant green spaces. These gardens do more than just produce fresh fruits and vegetables; they cultivate a sense of community among residents who might otherwise never interact. Working side-by-side, neighbors share gardening tips, stories, and the bounty of their harvest. Furthermore, these green oases provide crucial habitats for pollinators like bees and butterflies, which are essential for a healthy ecosystem. They also offer a unique educational opportunity for children to learn about food sources and the environment firsthand.
What is the main idea of this passage?
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A
Urban areas are being transformed by the creation of new parks.
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B
Community gardens offer multiple significant benefits to urban neighborhoods.
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C
Gardening is an effective way for children to learn about the environment.
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D
The primary purpose of community gardens is to provide habitats for pollinators.