Why are there so many volcano's erupting around the ring of fire?

The ring of fire is many under water volcanoes, it is a circle of volcanoes. It just takes plates to move or magma build up for it erput

Master planned communities outside of chicago. note: population density means people living in an area per square mile. chicago, an urban and highly populated area has a much more higher density than a desert, amish community, settlement, or nomadic region.

Answeroil-shale;