The ocean floor is primarily oceanic crust, but it also includes the edges of the continent (continental margins). Although once thought to be featureless plains, there are many features that have been discovered on the ocean floor. Some of these features are associated with plate tectonics because they are caused by plate interactions at the boundary. Some of them can occur anywhere on the ocean floor and are not associated with plate boundaries.

The cross-section below shows the tectonic plates making up an ocean between two continents.
Match the features below with the locations indicated by the letters on the diagram above. (You may use the same location more than once.)
Divergent Plate Boundary
Subduction Zone
Mid-Ocean Ridge
Trench
Passive Continental Margin
Volcanic Ocean Island
Continental Volcanic Arc