Question

what is the primary source of energy for photosynthesis? oxygen sunlight heat

Explanation:

Photosynthesis is the process by which plants, algae, and some bacteria convert carbon - dioxide and water into glucose and oxygen, using light energy. Sunlight provides the energy needed to drive the chemical reactions in photosynthesis. Oxygen is a product, not a source of energy, and heat is not the primary energy source for this process.

Answer:

sunlight