Question

what do you do to the size of a pile if you remove rocks?

Explanation:

When rocks are removed from a pile, the amount of material in the pile decreases. Since the size of a pile is related to the quantity of its constituent elements (here, rocks), reducing the number of rocks (by removing them) leads to a reduction in the pile's size. This is a basic principle of quantity - related changes in physical objects.

Answer:

The size of the pile becomes smaller.