Question

The rate of erosion is directly proportional to the velocity of the river. Erosion is the most prominent action of river in its ______.

Options

• Upper course

• Middle course

• Lower course

• In all the three stages of the river

Answer 1

Upper course

Explanation:

Erosion is most prominent in the upper course of the river where velocity is high, leading to vertical erosion. This is because the rate of erosion is directly proportional to the river’s velocity, which is greatest in the upper course (mountainous region) compared to middle and lower courses where deposition dominates more.