There are many natural processes that shape the Earth's surface. These processes can act as constructive forces, destructive forces, or both. Which of the following best illustrates a natural process acting as a constructive force?
Responses:
A. Wind depositing sand to build up sand dunes.
B. A glacier weathering a mountainside.
C. A river eroding soil during a flood.
D. Acid rain breaking down the surface of a rock.