signals transported by nerve cells exchange of oxygen in the lungs transport of waste by blood reproduction of skin cells
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Toni got a cut on her arm while playing in a softball game. A few weeks later, the cut was healed. Which process is most responsible for repairing the cut?
Possibilities:
- signals transported by nerve cells
- exchange of oxygen in the lungs
- transport of waste by blood
- reproduction of skin cells

reproduction of skin cells