What is the part of earth where life exists and extends from the deep ocean floor up into the lower atmosphere?

The part of Earth where life exists is known as the biOSphere. It encompasses all ecosystems, including those in the deep ocean, on land, and in the lower atmosphere, extending from the deepest ocean trenches to the upper reaches of the atmosphere where life can survive. The biOSphere is a complex web of interactions among various organisms and their environments, sustaining a diverse array of life forms.