Events in which molten rock spews out of the mantle as ash, lava, and gases

Volcanic Eruption Events in which molten rock spews out from the mantle to the surface of Earth as ash, lava, and gases; major geological events that occur when a dense plate subducts below a less dense plate. Divergent Boundary Occurs when two tectonic plates move away from each other.

Explanation:

c. seafloor spreading occurs.

d. crust becomes molten rock.

e. denser plates slide under lighter plates.