Since there is a limited number of channels in the plasma membrane, they can only transport . *

a. limited amounts of solutes
b. limited amounts of lipids
c. unlimited amounts of solutes
d. unlimited amounts of lipids

Because people are wasting it

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.