Question

Name the following
Huge rocks piled up in the hilly regions to slow down the flow of water

Answer 1

Oce weding breaks apart so much rock that large piles of rocks. Water is the most important agent of chemical weathring

Answer 2

Rock dam is the name of huge rock piled up in hilly regions in order to slow down flow of water.  

Explanation:

This is also helps to reduce the flow of the water when the water is moving in high speed. This rock dam is helpful to reduce the soil erosion. This way the water flows from the high level to the low level with no branches with a continuous flowing to the plain land from the high land.