Sediments moving from an upper layer to the water layer in an ecocolumn can represent ?

A. acid rain
B. land erosion
C. liquid runoff
D. runoff of animal waste

Run off of animal/plant waste

Explanation:

The run off of animal/plant waste occurs in 3 layers:

upper layer: the terrestrial chamber, the decomposition chamber, and the aquatic chamber.

The terrestrial layer represents the land habitat including plants and insects whereby waste are moved into the  

The decomposition layer much like a compost pile where it decomposes and then move into

The aquatic layer much like a mini freshwater habitat for aquatic plants and even small fish, it serves as food sources for them

Sediments moving from an upper layer to the water layer in an eco-column can represent  land erosion

Explanation:

The movement of this sediments from the upper layer to the water layer, this results into water runoff and this is land erosion