Unfortunately no, my friend is not correct. The CO2 pollutants leaving his exhaust are warm, yes, but that is why our atmosphere is creating global warming which is affecting climate in all regions. When there is more people that means more cars and more pollutants being dispersed into our atmosphere.
The right answer would be A)ribosomes
The answer is d. dismantling stored fat in fat cells
Independent variable would be the thing that changes so the size of the rock