Question

Give an outline of river erosion

Answer 1

This is the outline of river erosion

Answer 2

Rainfall snow deposits over the mountains or spring coming out through the earth surface are the main water source of river . The role of running water brings change and degradation in the earth's surface considered to be the most significant of all the geomorphic agents

Some of  depending on the nature of land surface,viz.

1Overland

2Linear surface