What is the main purpose of photosynthesis?

The main purpose of photosynthesis is to convert solar energy into chemical energy, which is stored in the form of glucose. This process occurs in plants, algae, and some bacteria, primarily in their chloroplasts. During photosynthesis, these organisms utilize sunlight to synthesize glucose from carbon dioxide and water, releasing oxygen as a byproduct. The glucose produced serves as an essential energy source for the plant itself and, indirectly, for other organisms that consume the plant, forming the basis of the food chain. This energy conversion is a critical component of life on Earth, as it provides the energy necessary for growth, reproduction, and overall survival of most living organisms.