Oxygen is released during photosynthesis during the light phase of photosynthesis.
Carbon Dioxide and Oxygen
Explanation
Photosynthesis is a process in which light energy is used to split water that releases oxygen gas and hydrogen ions whereas carbon dioxide gas combines with the hydrogen to make glucose. The reactants for photosynthesis are light, energy, water, carbon dioxide and chlorophyll and the products are glucose, oxygen, and water.
