What is the process called when a lithospheric plate descends into the mantle?

Pacific Plate, North American plate, Eurasian plate, Antarctic plate, Indo-Australian plate. South American plate, and African plate

Ifound this information on google “yes. they have a mouth and brain at one end and an anus at the opposite end. what characteristics distinguish an annelid from other worms? annelids have segmented bodies and a coelem which is a tube filled with fluid and contains most of the organs.“ i hope it you