Volcanoes form when magma from deep within Earth pushes through cracks in the crust. When pressure builds sufficiently, an eruption occurs, releasing lava, ash, and gases. Volcanic activity has both destructive and constructive effects on landscapes.
Which sentence best summarizes the passage?
-
A
Volcanoes are geological features created by rising magma that erupt and reshape landscapes in both harmful and beneficial ways.
-
B
Volcanic eruptions are always catastrophic events that destroy everything in their path for many miles.
-
C
Magma is the term for molten rock found deep beneath Earth's surface before it reaches the crust.
-
D
Scientists monitor volcanoes closely to predict when dangerous eruptions are likely to occur.