The correct answer is A. Oxygen.
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms’ activities. This chemical energy is stored in molecules of the sugar, glucose.
The process of photosynthesis can be summarized by the following chemical equation:
6CO2 + 6H2O + light energy â C6H12O6 + 6O2
In this equation, six molecules of carbon dioxide (CO2) and six molecules of water (H2O) are combined with light energy to produce one molecule of glucose (C6H12O6) and six molecules of oxygen (O2).
The oxygen gas that is released during photosynthesis is a byproduct of the reaction. It is not used by the plant, but is released into the atmosphere.
The other options are incorrect because they are not produced during photosynthesis. Nitrogen (N2) is the most abundant gas in the atmosphere, and it is not used by plants. Water vapor (H2O) is a product of transpiration, which is the process by which plants lose water vapor through their leaves. Carbon dioxide (CO2) is a reactant in photosynthesis, and it is not released during the process.