Question

What is the Main function of the rivers in its upper courses in land formatuon

Answer 1

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In the upper course the dominant activity of a river is erosion. Many land forms are shaped by this activity of the river. Along its course, it erodes bed and banks, and carries large boulders of rock with it and deposits it. Thus, apart from having a fertile alluvial soil, they also help in land formation.

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Answer 2

Answer:

the part of a river lying in the mountains and hills is its upper course, a river erodes the valley bed more than the sides. A waterfall is formed when a river descends suddenly from a higher level to a lower level.

Explanation: this answer is by a 7th grader (and i'm the one) the answer is from 7th class NCERT SOCIAL SCIENCE  book