Which phrase gives a force scientists believe is responsible for tectonic plate motion?

The phrase that gives a force scientist believe is responsible for tectonic plate motion is  is convection in the mantle.

Explanation:

Hot material near the Earth's core increases, and colder mantle rock decreases. "It's kind of like a pot boiling  in high degree on a stove.Tectonic plate is the theory that the earth's outer shell is divided into several plates that glide over the mantle.We can know the features and movements of Earth's movement in the present and past with the help of the tectonic plate.

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