keep water balanced in cells. prevent cavities in teeth. heal cuts and scratches. carry oxygen in blood.
I gave my students this multiple choice question: Zinc is a mineral that helps

Only one answer is correct among these 4 choices:
- keep water balanced in cells.
- prevent cavities in teeth.
- heal cuts and scratches.
- carry oxygen in blood.

Could you tell me which one is correct?

heal cuts and scratches.