Final answer:
In photosynthesis, oxygen is a product and is released by the plant into the atmosphere. Option c.
Step-by-step explanation:
The role of oxygen in photosynthesis is critical as it is one of the products created during the process. Plants intake carbon dioxide and water to initiate photosynthesis, which, in the presence of sunlight, produces glucose and oxygen. The oxygen generated is considered a waste product, as it is not used by the plants for their metabolic processes, and therefore, it is released into the atmosphere through the stomata.
Considering the given options, the correct answer would be: B) It is a product, so it is released by the plant.