Question

which is an example of a surface feature caused by a constructive force?
a. wind that erodes part of a hill, forming a mesa
b. water that deposits sediment along a riverbank, forming a delta
c. water that repeatedly freezes and melts within small cracks in a rock, forming wider cracks
d. fungi that consume minerals from the surface of a rock, forming holes in the surface of the rock

Explanation:

To determine the answer, we analyze each option:

• Option A: Erosion (wind eroding a hill) is a destructive force, as it removes material.
• Option B: Deposition (water depositing sediment to form a delta) is a constructive force, as it builds up new landforms by adding material.
• Option C: Physical weathering (water freezing/melting in cracks) is a destructive process that breaks down rocks.
• Option D: Biological weathering (fungi consuming minerals) is destructive, as it breaks down the rock surface.

Constructive forces build or create landforms, while destructive forces break down or remove material. Deposition (as in forming a delta) is constructive.

Answer:

B. water that deposits sediment along a riverbank, forming a delta