Answer :
Answer: Iodine
Explanation:
Carbon, Hydrogen, and Oxygen are all the basis of most of what makes up animal tissues.
Iodine is needed for the body. But, in small amounts. Thus it would be in a much smaller quantity.

Explanation:
Carbon, Hydrogen, and Oxygen are all the basis of most of what makes up animal tissues.
Iodine is needed for the body. But, in small amounts. Thus it would be in a much smaller quantity.