How are subduction zones formed and what processes contribute to their development?

Subduction zones are formed when one tectonic plate is forced beneath another plate. This process occurs due to the differences in density between the plates, with the denser plate sinking below the less dense plate. The development of subduction zones is primarily driven by the movement of tectonic plates and the forces associated with plate boundaries. The convergence of plates, where one plate is pushed beneath another, is a key process that contributes to the formation of subduction zones. Additionally, the presence of oceanic crust, which is denser than continental crust, can also play a role in the development of subduction zones.