Physical Differences?

Question

What accounts for physical differences between Nigerians, Koreans, Germans, and Navajos?

Its environmental homework. thanks!!

Answer 1

their physical environment, breeding, diet, and amount of work and exercise

Answer 2

Nigeria sends out more scam emails just dying to give you millions of dollars laying around.

Answer 3

A million years of evolutional adaptation. Climate, diet, work, living environment.