Answer:
The correct answer is trench and volcano.
Explanation:
When two tectonic plates with distinct densities come into contact with each other because of the convection currents, which are generated by the heat inside the asthenosphere, a convergent plate boundary gets produced. The deep trenches are generally produced when one of the plates slides underneath each other, a procedure known as subduction. The plate that is underneath will move under the mantle, and there will be a discharging of fluids from the rock that will somewhat melt the mantle. The elevation of molten rock takes place and may erupt violently to generate volcanoes.
