Final answer:
The biosphere is the part of Earth where life is found and includes the lithosphere, hydrosphere, and atmosphere.
Step-by-step explanation:
The biosphere is the part of the Earth that includes the air, land, surface rocks, and water where life exists. It comprises the interaction of the lithosphere, hydrosphere, and atmosphere. The lithosphere is the Earth's outermost layer of crust, which includes land. The hydrosphere is all the water on or near Earth's surface, and the atmosphere is the layer of gas that surrounds the planet.