water removes top soil and wind smashes the plant . both these agents may carry a lot of organic matter in them but erosion occurs mainly due to these agents only.
Because wind slowly and constantly wears the object down, but it takes a long time. Water, however, not only does this in the rivers and streams, but falls in the form of rain, further wearing down...
by wind erosion the soil is carried by the wind. as in a storm, the soil is carried by the wind. by water erosion the soil is carried by the water. as in high tides the soil is taken by the water...
In one, the sediments are carried by the wind and are usually fairly small. In the other, the sediments are carried by moving water and the sediment size can be quite diverse.