What organisms supply almost all the energy in the biosphere?

Almost all the energy in the biOSphere is supplied by photosynthetic organisms, primarily plants, algae, and some bacteria. These organisms capture sunlight through photosynthesis, converting it into chemical energy stored in glucose and other organic compounds. This energy forms the base of the food web, supporting a wide range of life forms, from herbivores to predators. Consequently, they play a crucial role in sustaining ecosystems and the overall energy flow in the biOSphere.