What sphere is asthenosphere and lithosphere a part of?

The asthenosphere and lithosphere are part of the Earth's geosphere, which encompasses the solid components of the Earth, including its rocks and minerals. The lithosphere is the rigid outer layer of the Earth, while the asthenosphere lies beneath it, characterized by a semi-fluid layer that allows for the movement of tectonic plates. Together, they play a crucial role in plate tectonics and geological processes.