During a chemical reaction, increasing the temperature often a. increases the rate of chemical change. b. prevents a chemical change from occurring. c. decreases the rate of chemical change. d. reverses the direction of chemical change.

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.