As the oceanic plate sinks into the mantle, part of it melts, and the melted rock rises up through the continental plate, forming a range of volcanoes on the edge of the continental plate.
(the oceanic plate; sinks; into the mantle) (part of it; melts; ) (the melted rock; rises; up)
the oceanic plate part of it the melted rock
sinks melts rises
into the mantle
up