Definition: This is the process by which organisms acquire traits through sexual reproduction and/or mutation and then pass on these traits to the succeeding generations.

Evolution

Explanation:

Mutations being passed on from parent to offspring create diversity and are a catalyst for evolution.

cuz he's blad

explanation:

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.