Plz I need help with this!! Explain how entropy relates to the amount of energy that is available in the different trophic levels of a food chain

There ya go!!

Explanation:

Entropy is defined as the measure of heat that is available in any kind of system. When moving towards the next levels in the food chain, the distribution of heat will be less at each stage and at the lower levels of food chain the heat energy that is produced will be high and the value of entropy will be less.

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.