Earthquakes are caused by plates moving. what causes the plates to move​

Earthquakes occur along fault lines, cracks in Earth's crust where tectonic plates meet. They occur where plates are subducting, spreading, slipping, or colliding. As the plates grind together, they get stuck and pressure builds up. Finally, the pressure between the plates is so great that they break loose.

Explanation:

The tectonic plates are always slowly moving, but they get stuck at their edges due to friction. When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we feel.

Explanation:

it cools slower in the earth meaning the crystals have more time to form than lava on the surface

if you listed your answers right then i believe your answer is b.