The oceanic plates move away from each other for a type of boundary that is called divergent Boundary and seafloor spreading.
What is a divergent boundary?
A divergent boundary is one that is created due to the movement of the seafloor away from each other and occurs along the mid-oceanic ridges where the lava or magma flows from the upper mantle to the lower lithosphere and here the upwelling takes place. Thus it pushes the plates away on both sides.
Find out more information about the plates.
brainly.com/question/18219355
