1. How does sea-floor spreading occur?

A. New materials are being added to the asthenosphere.
B. Earthquakes brake apart the ocean floor.
C. Sediments accumulate at the area of spreading.
D. Molten material beneath Earth's crust rises to the surface.*

4 answers

Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. Seafloor spreading helps explain continental drift in the theory of plate tectonics.

Right.

thanks!

soooooo, D?