Which factor divides freshwater ecosystems into two main types?

a. depth

C. water movement

b. temperature

d. presence of animals

C. water movement

Explanation:

Freshwater ecosystem is divided into two categories or types on the movement of water i. e. lentic and lotic. Lentic is a type of freshwater ecosystem in which water movement is slow. Examples of lentic are lakes and ponds while lotic is a type of freshwater ecosystem in which water movement is fast. Examples of lotic are rivers and streams.

The factor that divides freshwater is : temperature