Answer:
soil
organic layer
Step-by-step explanation:
The water is one of the major factors that contributes to erosion. The effect of the water is mostly seen when there is a larger amount of it, in the form of runoff or flood caused by rainfall. The layers that the water manages to move easily are the layers that are not hard, compact, and in general are much more loos. The soil and the organic mater are the layers that feel the effect of the water the most, as both of them have compositions that enable the water to further break them apart, saturate them, and eventually move them away with it.