The population of red beetles will more likely to decrease over time, meanwhile the green beetles may increase. This is because in a new environment, red beetles are more likely to be found by predators, and green ones can camouflage themselves, so the red ones will be eaten, while the green ones stay unbothered so that the rate will even increase.
Nutrients
If that's not the answer maybe it can be amino-acids
The answer should be "His observation of the geographic distributions of living things."
The answer to this question is B.
