Choose the correct description of the conveyor-like action of plate tectonics on Earth
A - Earth's mantle is broken up into plates that float beneath the overlying lithosphere. The bottoms of the mantle's convection cells drag the tops of the plates, making them move. This movement causes spreading in some places and subduction in others.
B - Earth's lithosphere is broken up into plates that float beneath the overlying mantle. The bottoms of the mantle's convection cells drag the tops of the plates, making them move. This movement causes spreading in some places and subduction in others.
C - Earth's lithosphere is broken up into plates that float on the underlying mantle. The tops of the mantle's convection cells drag the bottoms of the plates, making them move. This movement causes spreading in some places and subduction in others.
D - Earth's mantle is broken up into plates that float on the underlying lithosphere. The tops of the mantle's convection cells drag the bottoms of the plates, making them move. This movement causes spreading in some places and subduction in others.

The procedure includes tectonic plates being hauled into the mantle at specific focuses and moving ceaselessly from one another at others, in what has been named 'the transport line'.

Plate tectonics relies upon the reverse connection between thickness of rocks and temperature.

At mid-maritime edges, rocks are hot and their thickness is low, making them light or progressively ready to glide. As they move away from those edges they chill off and their thickness increments until, where they become denser than the hidden hot mantle, they sink and are 'hauled' under.