Question

4- Why water falls are mainly formed in the Upper course of the river? How?

Answer 1

Explanation:

As the river erodes the landscape in the upper course, it winds and bends to avoid areas of hard rock. This creates interlocking spurs, which look a bit like the interlocking parts of a zip. When a river runs over alternating layers of hard and soft rock, rapids and waterfalls may form.

Hope it helps.

Please mark me as BRAINLIEST.