What do the terms heterozygous and homozygous mean?

Heterozygous- a certain gene that can carry two different alleles
Homozygous- a certain gene that carries two copies of the same alleles

Well, both latitude and intensity of light affect temperature because, the higher the light intensity, the higher the temperature and since latitude is the measure of how close you are to the equator, then the closer to the equator you are, the higher the temperature is.

The answer is d have a nice day