The image below shows what occurs under Earth's surface in certain areas.

Question

What does the model demonstrate?
A.
In the asthenosphere, circulating heat expands the thickness of the crust of each plate.
B.
Tectonic plates are pushed apart due to steam caused by heat circulation in the asthenosphere.
C.
Tectonic plates are pushed apart partly due to convection currents moving through the asthenosphere.
D.
In the asthenosphere, as heat circulates, plates are pushed upward causing seismic activity.

Answer 1

The model likely demonstrates:

C. Tectonic plates are pushed apart partly due to convection currents moving through the asthenosphere.

Convection currents in the asthenosphere are a key mechanism in plate tectonics, causing the movement of tectonic plates.