The compressional movement of plate boundaries, such as observed at the juan de fuca plate, is representative of which type of boundary?

Convergent boundary

Explanation:

Convergent boundary are boundaries where tectonic plates collides. Base on the question, the plate involve is the Juan De Fuca plate. The Juan De Fuca plate is an oceanic crust and it collides with the north American plate which is a continental crust.

When oceanic crust collides with a continental crust , the oceanic crust will be subducted . The oceanic crust is usually denser than the continental crust and this makes the plate less active. When it(oceanic crust) collide with the very active and less dense continental crust , the continental crust override it to subduct the oceanic crust.

The Juan De Fuca plate is subducted by the North American plates .Through the subducted zone trenches are formed, magma are introduced through cracks and fissure causing volcanic eruption.

The picture above illustrate how the Juan De Fuca plate is subducted by the North American plate.