Brainliesttt ! ! : )

what is true of a synthesis reaction?

the products are often pure elements.
the reactants must be in an aqueous solution.
there is only one product.
there must be three or more reactants.

C14 dating since carbon is present in both living and no living objects .

Idont know but good luck; )

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.