Trivia: What is NOT used by plants to create energy through photosynthesis?
Water
Sunlight
Oxygen
Carbon dioxide
Correct Answer: Oxygen
So why is this answer correct? : During photosynthesis, organisms take in sunlight, water, and carbon dioxide to create chemical energy in the form of glucose. A byproduct of this process is oxygen, which is emitted by plants and used by humans and animals. Plants, algae, and some bacteria all use photosynthesis to create energy.