Answer:
a. Convergence
Step-by-step explanation:
- This process leads to the mass removal of tectonic plates from the earth's crust and is responsible for the formation of volcanic arc and mountain building activities.
- Convergence means destructive activity caused due to the plates which collide with each other and leads to the formation of surface features n the surface of the earth.
- The convergence zone is thus defined as the zone where the lithosphere goes underneath the oceanic heavier plate and gets subdued to intense heat and pressure and hence burns as a result of the tectonic force these boundaries are also demarcated by earthquakes and landslides and events of volcanic eruptions.