Question

Why do organisms/cells need oxygen?

• A. To store energy in the form of food
• B. To convert water into usable form
• C. To break down food and release energy
• D. To destroy dead cells

Answer 1

The correct option is C

To break down food and release energy

Most living organisms, including plants and animals, require oxygen for life. Organisms need oxygen for cellular respiration, in which energy is released from glucose. Energy is needed by the organism for growth, mobility, and reproduction.