Continental drifting and seafloor spreading are closely related processes that explain the movement of Earth's continents.Continental drifting is the gradual movement of continents across Earth's surface. Seafloor spreading is the process where new oceanic crust forms at mid-ocean ridges and slowly pushes older crust away.Relation - As new crust forms and spreads at mid-ocean ridges (seafloor spreading), it pushes the tectonic plates that carry continents with them, causing continental drift. So, seafloor spreading drives continental drifting.