Where is the ocean deeper at the center of a plate or at the boundary?
The ocean plate is deeper at the convergent boundary
At the divergent boundary there are often ridges and volcanic mountains, some of the volcanos even reaching the surface.
In the middle of the plate there are often relatively flat sections or undersea plains.
At the subduction zone of a convergent boundary the ocean plate is both pulled and pushed down. These subduction zones are the site of deep ocean trenches. The deepest part of the ocean.