Cooler, older, oceanic lithosphere sinks into the mantle at

A. Sites of long-lived, hot spot volcanism in the ocean basins

B. Subduction zones along convergent plate boundaries

C. Rift zones along mid-ocean ridges

D. Transform fault zones along divergent plate boundaries

Answer: B. Subduction zones along convergent plate boundaries

Correct answer is “subduction zone along convergent along convergent plate boundaries”. The cool oceanic lithosphere recycles in subduction zones, where it falls back into the mantle. They can be found where the oceanic lithosphere of one plate merges with the lithosphere that is less dense of another plate, which is at convergent plate borders.