Here's why:
* Photosynthesis: Plants use sunlight to convert carbon dioxide and water into glucose (sugar) for energy through a process called photosynthesis. This is the primary way energy from the sun enters the food chain.
* Food Chain: Humans obtain energy by eating plants or animals that have eaten plants. This means we indirectly get energy from the sun through the food we consume.
* Cellular Respiration: Our bodies break down the food we eat through a process called cellular respiration. This process releases energy from the food and converts it into ATP, the energy currency of our cells.
In summary: While the sun is the ultimate source of energy for life on Earth, humans don't directly absorb sunlight to fuel their bodies. We rely on the food chain and cellular respiration to utilize energy from the sun.
