What form of research provides the best evidence of the evolutionary relationship between two hominid species?

it would affect precipitation by causing flooding in some areas of the world due to climate increasing, causing the glaciers in the northern and southern pole of our planet to melt.

i wish you would have provided choices to simplify it and allow me to give an exact answer.

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.