What can cause a death to a volcano?

Answer 1

There are several once active volcanoes round the world that have become dormant long ago. The magma flowing beneath, may have found another weak spot , so taking the pressure off the once active volcano. Without the pressure, the volcano can cool down and become dormant. There is always the chance that a dormant volcano can become active again - it depends mainly on the pressure below - and often causing even more devastation as the cap is blown off.