What causes volcanoes to become extinct?

Answer 1

Plate tectonics. As the plates shift on the large ball of molten rock around the core, the surface plates move to form new volcanoes while the old ones are left behind and are nothing but mountains. A good example of this is Olympus Mons the largest volcano in the solar system. Because Mars is so small its core wasnt hot enough to have plate tectonics so the volcano kept growing until the planets core cooled down so much that it is no longer in a molten state.

Answer 2

Volcanoes become extinct when they no longer have access to a source of magma or when the tectonic plate movement shifts away from the area. This results in a lack of volcanic activity and the volcano no longer erupting. Over time, the volcano can become eroded and weathered, further contributing to its extinction.

Answer 3

the lava hardens over the new lava and it cant rise