Hello!
Don't hold me on it, but I think your answer would be A, bacteria.
Enjoy.
~Isabella
The answer is atmospheric
Apes were basically monkeys. They walk on their hands and feet but crouched. There's a bunch of theories saying that humans evolved from apes. As apes evolved, they started walking upright.
Is a branch of science concerned with the description, prediction, and understanding of natural phenomena, based on observational and empirical evidence.
