The biosphere refers to the global sum of all ecosystems, encompassing all living organisms and their interactions with the physical environment. It includes terrestrial, aquatic, and atmospheric components, providing a complex and interconnected system that supports life on Earth. The biosphere functions as a dynamic network where energy and nutrients cycle through different ecosystems. Understanding the biosphere is essential for environmental conservation, climate change studies, and sustainable resource management, highlighting the importance of maintaining biodiversity for the planet's health.