Question

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Answer 1

1.) Vertical erosion:

rivers discharge is low in the upper course, so the river can only erode downward

2.) weathering:

the valley's sides are slowly broken down through weathering

3.) mass movement:

overtime the weathering of material will be transferred by means of gravity along with rainfall towards the rivers channel , later then steepening the valley's sides.

4.) V shaped valley:

the narrow steep sided valley shape is created due to upland rivers

Answer 2

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