All of the following are forms of energy a living organism can use except: a. heat b. mechanical c. chemical d. nuclear

b mechanical because were not robots and stuff like that

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.