Adaption, evolution, variation are all causes of natural selection.
hope this helps..
brainliest..?
<span>d.crabeater seal Hope I helped you </span>
Answer:
D.
Explanation:
This amount of space in air that can hold water changes depending on the temperature and pressure.
19. The atomic number indicates how many neutrons there are, and the atomic mass tells us how many protons and neutrons are present within the nucleus of an atom.
