Seafloor spreading helps explain continental drift because it shows that continents move with the oceanic __ as it spreads away from midocean ridges.

Seafloor spreading helps explain continental drift in the theory of plate tectonics. ... Plates that are not subducting are driven by gravity sliding off the elevated mid-ocean ridges a process called ridge push. At a spreading center, basaltic magma rises up the fractures and cools on the ocean floor to form new seabed.