The zone in an ecosystem that provides habitat for living organism is referred to as

Answer Details

The biosphere is the zone of the Earth that provides habitat for all living organisms. It encompasses all ecosystems on the planet and includes the parts of the atmosphere, lithosphere (land), and hydrosphere (water) where life exists. The biosphere extends from the deepest ocean trenches to several kilometres into the atmosphere, wherever conditions permit organisms to survive.

The atmosphere is the layer of gases surrounding the Earth; while some organisms live in the lower atmosphere, it is not itself a habitat zone for all life. The lithosphere is the solid outer layer of the Earth (the crust and upper mantle); it provides the physical surface on which terrestrial life exists but does not include aquatic or atmospheric habitats. "Environment" is a broader, more general term that refers to the surroundings of an organism and includes both biotic and abiotic factors; it is not the specific ecological term for the life-supporting zone.

The biosphere is the correct ecological term because it specifically denotes the global sum of all ecosystems, integrating land, water, and air wherever life is found.