Which two geological processes result from vertical circulation within the mantle?

Mantle refers to the Earth's interior between the crust and the core, which consists of hot, dense silicate rocks. From trhe vertical circulation within the mantle result two geological processes : The subduction of hot rock along oceanic ridges results from the mantle’s downwardcirculation, while the upwelling of oceanic plates at trenches results from the mantle’s upward circulation