Your answer would most likely be letter
B. Biosphere
The right answer is vitamin C—citric acid.
Vitamin C or ascorbic acid protects against cellular aging, is essential for the immune defenses and increases the assimilation of iron of plant origin.
Citrate is a biological molecule found in all living organisms because it is involved in the Krebs cycle (or citrate cycle) to produce energy.
Answer:
HII
Explanation
I beileive its C i hope this helps
The answer to this question is b carpel that's the answer
