Answer:
A. biology
Explanation:
biology is the human body
I believe the answer is C which is supporting a variety of organisms, cleaning oil from oceans, producing oxygen.
Answer:
The statement true is A. A and B are isotopes of the same element.
Explanation:
Isotopes correspond to atoms of the same element with different mass numbers (A), that is to say they differ in the amount of neutrons in the nucleus. In the case of compound A it has 10 neutrons, and B has 11.