10. The potential energy available in a food chain (A) increases at each link in a
food chain. (B) decreases at each link in a food chain. (C) remains the same
throughout the food chain.

Ibelieve the answer is relative humidity  because it makes more sense that way. solar flares usually occur in space it doesn't affect the earth, well it could but it wont make a significant damage.  latitude is land it doesnt do anything. prevailing winds, i dont know the correct meaning for this but i doubt that affects the land so it has to be relative humidity.