When animals feed off of land faster than the plants can regrow, the land is
a. below its carrying capacity
b. forested
c. overgrazed
d. depleted

C

When animals feed off of land faster than the plants can regrow the land is overgrazed.

Overgrazing results in damage of vegetation and the ground becomes liable to erosion.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

i think that it is plants