to provide energy for cell activities to produce sugar for storage in cells to release oxygen for breathing to supply carbon dioxide for photosynthesis
I gave my students this multiple choice question: Which of the following best describes the purpose of cellular respiration?

Only one answer is correct among these 4 choices:
- to provide energy for cell activities
- to produce sugar for storage in cells
- to release oxygen for breathing
- to supply carbon dioxide for photosynthesis

Could you tell me which one is correct?

to provide energy for cell activities