Well there are many words that can answer that. Is there a word box or hints towards the specific words? If not just say heavily.
A. seafloor spreading at mid-ocean ridges
Answer:
Ummmm... I think it is A?
Could u look at my most recent question and possibly help?
The Rocky Mountains is the largest mountain system in N.A
A divergent Plate boundary is where new ocean floor is created.
Extra: A convergent plate boundary (Oceanic-Oceanic, Oceanic-Continental, Continental-Continental) is where crust is destroyed.
