Which gas is a product of photosynthesis?

During photosynthesis, plants convert light energy, usually from the sun, into chemical energy, using carbon dioxide and water as raw materials. During this process, oxygen is produced as a byproduct.

In the presence of sunlight, chlorophyll in plant leaves captures light energy, which drives the chemical reactions that transform carbon dioxide from the air and water from the soil into glucose, a type of sugar that serves as food for the plant. The transformation also leads to the release of oxygen into the atmosphere. This oxygen is vital for most living organisms as it is used in respiration.

The other gases listed, such as carbon dioxide and nitrogen, are not products of photosynthesis; rather, carbon dioxide is one of the reactants consumed during the process, while nitrogen is not significantly involved in photosynthesis at all. Helium, being a noble gas, does not play any role in photosynthesis either. Thus, oxygen is the direct product of the photosynthesis process, which is essential for both plants and the broader ecosystem.