Question

3. What is the grinding of rock by friction or impact?

a) Abrasion
b) Decomposition
c) Erosion
d) Infiltration

Answer 1

Abrasion

Step-by-step explanation:

All of the other ones wouldn't involve grinding against each other

Answer 2

Abrasion

Step-by-step explanation:

Because, "Abrasion is the grinding away of rock by friction or impact."