How does flooding affect rivers?

a. it causes river bends to be cut off

b. it picks up deposits from floodplains

c. it causes rivers to divert

d. it causes river channels to change shape

D. It causes river channels to change shape

Explanation:

When a flood happens, it can cause many changes in the river. One of the changes is that river channels change the shape. Some of the rivers change forever. Sediments and big amount of water they contain are shaping the channels. The capacities of the channels change.  This has an indirect impact on the ecosystem.

A flood happens when a big amount of water enters the river very fast. Also, steep places are flooded more quickly than plains, which can bring to changing of the river route.