Which of the following best explain why the lower course of a river is sometimes choked with sediments?
1. The valley of a river is widest in its lower course.
2. The velocity of a river in its lower course is low.
3. The delta sometimes develops in a river's lower course.
4. Much of the river water is drawn for irrigation in the lower course.

A. 1, 2, 3 and 4

B. 1, 3 and 4 only

C. 1, 2 and 3 only

D. 2 and 4 only

Answer: Option C

Solution(By Examveda Team)

The lower course of a river is sometimes choked with sediments because the valley of a river is widest in its lower course, the velocity of a river in its lower course is low and the delta sometimes develops in a river's lower course.