if band 8 in sample F represents the mutated gene that causes baldness which other DNA samples may also have the baldness gene

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 light is great source of energy

Carbon-14 has a half-life of 5,730 years and most igneous rock is older than that.

The answer is b, as with an inference you make a statement with no evidence