Answer:
its to protect them from bugs and other harmful and store water because they dont get much water
Explanation:
B. Because a physical reaction is a change that can be seen. This particular situation is happening over a period of time, it isn’t something that happens instantly. Also I it would have been a chemical reaction, it would have mentioned something about the state of an element or the temperature or something along those lines.
Mutations can be man made but natural selection is a species changing due to the environment
