The process through which energy is captured and used by organisms is known as photosynthesis or, in some cases, chemosynthesis. In photosynthesis, plants, algae, and some bacteria convert sunlight, carbon dioxide, and water into glucose and oxygen. This process not only provides energy for the producers themselves but also supplies energy to other organisms in the ecosystem. Chemosynthesis, utilized by certain bacteria, involves converting inorganic compounds into organic matter without sunlight, mainly in deep-sea ecosystems.