At the end of seafloor spreading, where does the molten rock solidify?

Question

center of the ridge
on the edge of the ridge
under the new rock
between the old rock layers

Answer 1

At the end of seafloor spreading, the molten rock solidifies at the center of the ridge. As magma rises and erupts at mid-ocean ridges, it cools and solidifies to form new oceanic crust, primarily at the ridge's center, where the seafloor is actively spreading.