Natural Selection.
It favors the better adapted organisms.
No blacks are 100% human.. people are black because of the pigments in your skin. That is why we have light skins and dark skins not because light skins are more human than dark skins.
Answer:
both c and d are pretty accurate, but i dont have very much knowledge on warblers specifically. but those 2 answers would be the most common for such a case
Explanation:
It’s the brain because it tells what your whole body needs to do
It would be the fossils amount of mineral acidity im pretty sure!