Here's how it works:
* Photosynthesis: Plants and some bacteria use sunlight to convert carbon dioxide and water into glucose (sugar) and oxygen. This process is called photosynthesis and is the primary way energy enters the food chain.
* Food Chains: Animals eat plants or other animals that have eaten plants, obtaining the energy stored in the glucose produced through photosynthesis.
* Cellular Respiration: Living organisms break down glucose through a process called cellular respiration, releasing the energy stored within it to fuel their life processes.
Therefore, the sun is the ultimate source of energy for all life on Earth.
