One plate goes under another in a
a. subduction zone
b. transform fault area
c. seafloor spreading zone
d. region of paleomagnetism

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.