I need help on #17 PLEASEE!

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.

it marks things for degradation via the proteasome. it alters there celluar location.

its probably to later but whats the question

answerpalpalis group;