Which sell initially forms when two gametes unite during fertilization

Ineed more info for this, i don’t quite understand what you’re asking.

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.

Ican not answer this question since it does not have enough information