Question

what happens over time to rock that is stressed?
a. the color of the rock changes.
b. the shape of the rock deforms.
c. the rock melts to liquid.
d. the rock becomes gravel.

Explanation:

When rock is stressed over time, the main effect is related to its physical structure. Stress can cause the rock to change its shape (deform) rather than just change color (A is incorrect as color change is not the main effect of stress). Melting (C) requires high - temperature conditions (not just stress) and becoming gravel (D) is more related to weathering and erosion processes rather than just stress.

Answer:

B. The shape of the rock deforms.