Answer:
Crust and a small portion of the upper mantle
Explanation:
The lithosphere refers to the top portion of the earth, which is comprised of the crust and a very small portion of the upper mantle. The rocks present in this layer are hard and acts as a brittle zone and this layer is just above the asthenosphere. The lithosphere is of two types, namely the continental and the oceanic lithosphere. The thickness of the continental lithosphere ranges from 40 to 300 km, whereas the thickness of the oceanic lithosphere ranges from 50 to 200 km.
This lithosphere is made up of numerous tectonic plates and due to the formation of convection current in the mantle, these tectonic plates move over the layer of the asthenosphere.
