You are presented with the quiz "what does wound healing require" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "protein is used to repair cells by the human body" and "pain in the body indicates there is a wound which requires cell repair and cell regeneration". So, what's the best answer to the question?
Available options:
[I] protein.
[II] nutrients.
[III] Enzymes.
[IV] food.
[V] blood.
[VI] amino acids.
[VII] carbohydrates.
[VIII] cells.
Answer:
[I]