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:

Mid - ocean ridges are divergent plate boundaries. New oceanic crust is formed at mid - ocean ridges. As new crust is created, the existing oceanic crust moves away from the ridge. This is due to the process of seafloor spreading.

Answer:

C. away from the ridge