Heat and light (campfire), chemical ( beans as food), and kinetic (you hiking).
Lipids are good for making the cell membrane because they are stronger and block out things that should not be getting in out, for instance lipids mainly only let water and gases pass through.
Fossil evidence because these changed occur over long time periods (millions of years).
The answer would be A because a smaller population would die out faster. The best answer is A because they are more diverse which mean everyone is least likely to get the disease.
