Question

What causes most sediment to wash or fall into a river?

a. friction
b. deposition
c. mass movement and runoff
d. turbulence

Answer 1

Sediments are materials or conglomerate of materials, that can be carried away by water, wind or ice.

Mass movement and runoff cause most sediment to wash or fall into a river. Correct answer: C

Run off is type of mass movement when heavy rain washes material from the surface of a cliff over the edge and down onto the shore.

Answer 2

The correct answer is letter C. Mass Movement and runoff. The sediments are washed or fall into the river because of the mass movement of the water and the runoff that will surely bring the sediments down.