Answer:
Oxygen
Step-by-step explanation:
As you may already know, photosynthesis is the natural process made by plants (and some other living beings) where solar energy is transformed into chemical energy.
Photosynthesis is separated into two phases: the light-dependent phase and the light-independent phase. In the light-dependent phase, the plants capture sunlight, carbon dioxide, glucose and water, initiate a series of biochemical transformations that result in the synthesis of ATP (which will be the energy for the next phase), and in the oxidation of water that will release oxygen into the atmosphere.