Question

q2 organisms must have food because food is a source of energy. food supplies cells with oxygen. organisms never make their own food. all of the above

Explanation:

Food is broken down through metabolic processes to release energy for an organism's life - sustaining activities. Food does not supply cells with oxygen; the respiratory system is responsible for oxygen supply. Also, some organisms like plants can make their own food through photosynthesis.

Answer:

A. food is a source of energy.