Asharp, irregularly shaped rock falls into a river. over time, the edges of the rock become smooth and rounded by rubbing against other rocks. this is an example of a. chemical weathering b. biological weathering c. physical weathering

The correct answer is:

C.physical weathering

A sharp, irregularly shaped rock falls into a river. Over time, the edges of the rock become smooth and rounded by rubbing against other rocks. This is an example of physical weathering.

Explanation:

Physical weathering refers to the process in which rocks change their shape due to different physical processes such as the impact of the weather and humidity that comes from the water courses around. This processes cause the fragmentation of the rocks creating a break down into smaller parts normally becoming smooth and rounded.