Which substances are the reactants of photosynthesis?

In the process of photosynthesis, plants convert light energy into chemical energy, primarily in the form of glucose. The reactants needed for photosynthesis are carbon dioxide and water, which are combined in the presence of sunlight to produce glucose and oxygen.

Carbon dioxide is absorbed from the atmosphere through small openings in leaves called stomata, while water is taken up through the roots from the soil. Sunlight, typically absorbed by chlorophyll within the chloroplasts, serves as the energy source that drives the biochemical reactions. Therefore, carbon dioxide, water, and sunlight collectively serve as the essential reactants for this vital process.

The other choices do not accurately represent the reactants involved in photosynthesis. For example, oxygen is a product of photosynthesis rather than a reactant, and elements like carbon monoxide, nitrogen, or glucose are not directly involved as reactants in this process.