Which statement explains what happens to older crust during seafloor spreading?

Question

It is destroyed at coastlines.
It moves under continents.
It is destroyed at a mid-ocean ridge.
It moves away from a mid-ocean ridge.

Answer 1

The correct statement is: It moves away from a mid-ocean ridge.

During seafloor spreading, new oceanic crust is formed at mid-ocean ridges as magma rises to the surface. As this new crust is created, the older crust moves away from the ridge towards the continents.