Tectonic plate movement is created by in the underlying mantle.
rigidity
low temperatures
convection
condensation

Tectonic plate movement is created by convection in the underlying mantle. The correct option among all the options given in the question is the third or the second last option. The convection current is caused due to the temperature difference in the mantle. The material of the mantle near the core is very hot while the mantle material near the Lithosphere is cooler in comparison to the core.

Answer accretion;