Final answer:
Oxygen is the waste product of photosynthesis for organisms that produce it.
Step-by-step explanation:
The waste product produced by organisms during photosynthesis is oxygen. During photosynthesis, plants and some other organisms use sunlight, carbon dioxide, and water to produce glucose as a form of stored energy. As a result of this process, oxygen is released into the atmosphere as a waste product. Oxygen is essential for life, but for organisms that produce it during photosynthesis, it is considered a waste product.
Learn more about Photosynthesis and waste products