Answer: Aid growth, cell replacement, and cell and tissue repair.
Proof:
Emphysema, Lung Cancer, Cystic Fibrosis, etc.
What does challenge mean to you
I THINK the answer is d. Not 100% sure.
Goiter is the result of a dietary <u>deficiency</u> ... an enlarged thyroid due to
insufficient iodine. There's nothing you eat that <u>creates</u> goiter.