Question

In the upper course the dominant activity of a river is ______.

Options

• Valley

• Meander

• Erosion

• Mass wasting

Answer 1

In the upper course the dominant activity of a river is erosion.

Explanation:

In the upper course of a river, the dominant activity is erosion. This is because the river has a steep gradient and high energy that allows it to erode the riverbed and banks, forming features like v-shaped valleys and waterfalls. Erosion is more significant in the upper course as the river works to carve into the land.