The correct answer is
<span>D. All the populations and the surrounding environment</span>
Answer:
Plasma
Explanation:
Plasma carries water, salts, and enzymes. The main role of plasma is to take nutrients, hormones, and proteins to the parts of the body that need it. Cells also put their waste products into the plasma. The plasma then helps remove this waste from the body.
It becomes more alkaline where pH will be more than 8
They are all part of the Carbon cycle
