False, it is not necessary.
It depends on plates .
And continents are not classified on basis of plates.
Means it is false .
True is" Volcanoes are most commonly formed at the convergence or divergence of tectonic plates. For example in Mid-Ocean Ridges, where tectonic plates spread apart and subduction zones, where one tectonic plate sinks into the earth´s mantle underneath another tectonic plate."
