Final answer:
Photosynthesis is the process by which plants synthesize food in their leaves. The main structures involved are the mesophyll layer and the stomata. The reactants are carbon dioxide and water, and the products are glucose and oxygen.
Step-by-step explanation:
Photosynthesis is the process by which plants synthesize food, and it primarily takes place in the leaves. The main structures involved in photosynthesis are the mesophyll layer, where the process occurs, and the stomata, which regulate gas exchange. The reactants of photosynthesis are carbon dioxide and water, and the products are glucose and oxygen.