The primary role of chlorophyll in plants is to facilitate photosynthesis, the process by which plants convert sunlight into energy. Chlorophyll is the pigment responsible for the green color of plant leaves and absorbs light, primarily in the blue and red wavelengths, while reflecting green light. This light energy is used to convert carbon dioxide and water into glucose and oxygen. Chlorophyll's presence is essential for the survival of plants and the production of oxygen, making it a vital component in the food chain and ecological systems that support life on Earth.