Question

Which explanation describes why seafloor spreading occurs?

Answer 1

Answer:

Lithospheric plates move apart under the ocean floor.

Explanation:

The mantel convection currents movement occurs it stretches the crust apart. The heat from convection currents makes the the Earth crust molecules less stable because the heat makes them move apart and shake on molecular level which makes crust more flexible.

Answer 2

Answer:

Lithospheric plates move apart under the floor.

Explanation:

Because over time they spread out causing "seafloor spreading".

Hope this helps!