When an oceanic plate collides with a continental plate, the continental plate usually slides up and over the denser oceanic plate, pushing it down into the mantle, a process called production subduction induction convection trenching?

The correct answer is B Subduction. Subduction is the process by which an oceanic plate gets dragged under another plate and is eventually destroyed in the mantle. Subduction occurs at convergent margins where two oceanic plates collide or an oceanic and Continental plate collide. Oceanic crust is made of mainly of silica and magnesium which is heavier or denser than continental crust which is composed mainly of silica and aluminium.
The subducting plate melts producing excess magma giving rise to volcanoes along these margins.

The correct answer is:   [b]:   "has no atmosphere" .