Cells form a cell wall. Cells increase in size. Cells undergo cell division. Cells merge to become larger.
I gave my students this multiple choice question: As humans grow, their bodies change. Which of these statements explains how humans grow?

Only one answer is correct among these 4 choices:
- Cells form a cell wall.
- Cells increase in size.
- Cells undergo cell division.
- Cells merge to become larger.

Could you tell me which one is correct?

Cells undergo cell division.