Question

why is biosphere called the sphere of life​

Answer 1

Explanation:

The solid surface layer of the Earth is the lithosphere. ... The Earth's water—on the surface, in the ground, and in the air—makes up the hydrosphere. Since life exists on the ground, in the air, and in the water, the biosphere overlaps all these spheres.

Answer 2

Biosphere is called the sphere of life because it is the narrow realm of contact between lithosphere and hydrosphere.