What is the main function of the reproductive system? to transport substances
O to remove wastes
to continue the species
to make hormones

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.

multiply it by 5 in order for you to understand i cant give an exact answer.

answer; microsoft;

to this one it would be receptive field