Which of the following is a biotic aspect of an organisms niche
a. the water in the area
b. the food it obtains
c. amount of sunlight
d. amount of sand in the soil

B - the food it obtains! 

Hope that helps!

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.