Answer:
The lithosphere is composed of the crust and the uppermost portion of the mantle.
Explanation:
Earth is divided into several layers, all of which have their own unique properties that define them as such. The top-most layer is the lithosphere, below it is the mantle, and at the central part of the planet is the core. The lithosphere is the layer on the surface and closes to it, is composed of the crust and the upper-most, solid part of the mantle.
The lithosphere is solid, with its surface being composed of rock. It is the only part of Earth where there is life and where multiple different spheres interact with each other. What happens on the lithosphere and the conditions on it though is dependent on the activity of the layers below, as they are the ones that have the heat and pressure needed to create the biggest and most important processes.
