the size of each body cell the number of cells in its body the amount of energy in its cells the collection of water in each cell
I gave my students this multiple choice question: An elephant is a multicellular organism that weighs about 200 pounds at birth and can grow to weigh as much as 15,000 pounds. What increases as the elephant grows into an adult?

Only one answer is correct among these 4 choices:
- the size of each body cell
- the number of cells in its body
- the amount of energy in its cells
- the collection of water in each cell

Could you tell me which one is correct?

the number of cells in its body