Final answer:
The difference in density of oceanic and continental plates causes the subduction of oceanic plates under continental plates when they collide, leading to mountain ranges, volcanic activity, and earthquakes.
Step-by-step explanation:
The difference in density of oceanic and continental plates causes
the subduction of oceanic plates under continental plates when they collide.
The denser oceanic plate sinks beneath the lighter continental plate, leading to the formation of
mountain ranges, volcanic activity, and earthquakes.
Learn more about Plate Tectonics