What is the main function of a river in its upper course? Name the landforms formed in the upper course of a river.
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The main function of a river in its upper course is erosion. It erodes its bed and banks and carries large boulders of rock with it.
The landforms formed in the upper course of a river are V-shaped valley and waterfall.
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What do you mean by denudation?
Name the factors which affect work of a river.
How is a waterfall formed?
State the two characteristics of a river in its middle course.