Does magma consist only of rock forming materials ? explain

Magma is melted earth that heats up from the pressure of other rock building up underneath it. As it builds up more and more the magma gets hotter and hotter. When the volcano erupts the magma is introduced to the different air temperatures and force between in the earth and out of it. When it flows down the volcano it cools down and turns back to its original form of rock.

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.

Ithink that b is correct but just in case wait to see if someone else answers