How are starch and glycogen related? both starch and glycogen give wood its strength. humans store the energy from starch as glycogen. both starch and glycogen can be digested only by cows. plants store the energy from starch as glycogen.

Glycogen is the human counterpart of the plant starch. So humans store the energy from consumed starch as glycogen.

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.