Volcanoes- The force that occurs

At divergent boundaries magma rises to the surface and cools, then the boundary spreads more and more magma comes to the surface and cools and it continues to make the volcano taller. Or it can occur at hot spots where one plate dives beneath another.

The kind of force it is:

Volcanoes are natural forces, because we can not help it erupt it erupts on its own,we can not control when it erupts.