Question

multiple - choice question
why does an oceanic plate subduct?
it is less dense than the other plate
it is more dense than the plate it is colliding with
it just does...

Explanation:

When two tectonic plates collide, the denser plate subducts (dives beneath) the less - dense plate. Oceanic plates are generally more dense than continental plates. So, an oceanic plate subducts because it is more dense than the plate it is colliding with.

Answer:

it is more dense than the plate it is colliding with