Question

how does oceanic crust move along mid - ocean ridges?
away from dense crust
parallel to the ridge
away from the ridge
under less dense crust

Explanation:

At mid - ocean ridges, new oceanic crust is formed through seafloor spreading. Magma rises up at the ridge and solidifies to form new crust, pushing the existing crust away from the ridge.

Answer:

C. away from the ridge