Start with an energy value of one million kilocalories per m2 per year. Describe the significance of the shape of the pyramid, the energy values at each level, and its relationship to the Second Law of Thermodynamics.

to be honest I'm not sure

bc blah

explanation:

bc blah

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.