One plate goes under another in the subduction zone. So for
the given question, the correct option is option “A”. Subduction rates are not
very high. They can be only a few centimeters per year and that is the reason
people do not feel the effect. The plates between which the shifting occurs can
either be oceanic crust or the continental crust. Mountain formations are
necessarily associated with subduction movements of plates. In such cases the
movements are huge and can result in earth quakes as well.
