Different types of rock in a rock wall are usually easy to tell apart because of what

Sedimentary rocks such as limestone or shale are hardened sediment with sandy or clay-like layers (strata). They are usually brown to gray in color and may have fossils and water or wind marks. Metamorphic rocks such as marble are tough, with straight or curved layers (foliation) of light and dark minerals.

Explanation:

answer; i believe the correct answer is norming;

the answer your looking for is c. : )