What do stabilizing selection and directional selection have in common?
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A. They both decrease genetic variation.
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B. They are both caused by female choice.
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C. They are both forms of genetic drift.
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D. They both favor extreme phenotypes.

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.