The process by which plants make their food is called photosynthesis. During this process, plants use sunlight, carbon dioxide, and water to produce glucose and oxygen. The chlorophyll in plant cells captures sunlight, enabling the conversion of light energy into chemical energy stored in the form of glucose. This process is essential for plant growth and serves as the foundation of the food chain, supporting all life forms on Earth. Through photosynthesis, plants not only nourish themselves but also contribute to the atmosphere by releasing oxygen, crucial for the survival of most living organisms.