In the image below what kind of molecules does the label a represent?

Oxygen molecules

Explanation:

Plants, during the process of photosynthesis, give off oxygen molecules as a by-product of the process.

Plants, through the process of photosynthesis, use the energy gotten from sunlight to produce glucose from carbon dioxide and water molecules, and in the process, oxygen molecules are released into the atmosphere as by-product.

Therefore, the label A in the diagram represents molecules of water that is given off by plants.

as many times as you want

50% lit on the left side