Question

which statement best describes the role of plate tectonics in changes that occur on earth?
a. the subduction of oceanic crust cools the mantle and prevents volcanic eruptions.
b. the movement of plates builds pressure that is released during an earthquake.
c. convection currents in the mantle cause mountain ranges to slowly collapse over time.
d. seafloor spreading causes ocean basins to get smaller and shallower over time.

Explanation:

• Option A: Subduction of oceanic crust does not cool the mantle to prevent volcanic eruptions. Instead, subduction can contribute to volcanic activity as the sub - ducting crust melts and magma is formed.
• Option B: When tectonic plates move, they can get stuck at their boundaries. The continuous movement builds up pressure. When this pressure is suddenly released, it causes an earthquake. This is a well - known aspect of plate tectonics.
• Option C: Convection currents in the mantle are responsible for the movement of tectonic plates. They can cause mountain ranges to form (e.g., through continental - continental collision) rather than collapse.
• Option D: Seafloor spreading causes ocean basins to get larger over time as new crust is formed at mid - ocean ridges.

Answer:

B. The movement of plates builds pressure that is released during an earthquake.