In an attempt to reduce our dependence on non–renewable resources, and cut down on the harm to the environment, we could burn to produce electricity.

Ans. Biomass
   In an attempt to reduce our dependence on non–renewable resources, and cut down on the harm to the environment, we could burn biomass to produce electricity. Biomass fuels come from naturial materials like wood products, dried vegetation, crop residues, aquatic plants and even garbage.

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.

Your answer is going to be a. i know my biology