Answer:
Option C, Plate tectonics
Step-by-step explanation:
As per the theory of plate tectonics our earth consists of large number of different types of plates which are able to glide over the mantle. The crust and the outer part of the mantle is called lithosphere and as compared to the lithosphere, the tectonic plates are hard and acts like a rigid shell
Tectonic plates are also referred as lithospheric plates due to base similarity
Hence, option C is correct