I'm not sure but it might be C
Answer:
A. ocean trenches
Explanation:
I just took that test. Sorry I know I'm late and this won't help.
Answer:
Metabolism is the chemical reactions that take place inside a living organism. The reaction occurs in the cells. Digestion can be the best association to metabolism. The metabolic system recognizes which substances can be nutritious or poisonous. In order to complete this process, water is needed. The chemicals are dissolved in water and transported. Without water, no reaction can take place.
Metabolism is considered as the set of life-sustaining chemical reactions within the living organism’s body cells.
<span>Connective tissue often consists of relatively few cells embedded in an extracellular matrix.</span>
I think D because the whole thing is gaseous and it has two atmospheric layers
