Question

1. which process is responsible for the recycling of earths crust?

transform faulting
seafloor spreading
subduction
mountain building

Explanation:

Subduction is the process where one tectonic plate moves under another and sinks into the mantle. This recycles the Earth's crust as the sub - ducted plate is melted and incorporated back into the mantle. Transform faulting is about lateral movement of plates, seafloor spreading creates new crust, and mountain - building is related to plate collision and uplift, not crust recycling.

Answer:

Subduction