Answer:
Alleghenies, White Mountains, Green Mountains, Catskills
Explanation:
I feel like this is right. Sorry if I'm wrong.
Answer:sand dunes
Explanation:
They are man made barriers, made of sand, to protect the coast from erosion from the incoming waves. They also help to control flooding from storm surge.
Seafloor spreading<span> 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. </span>Seafloor spreading<span> helps explain continental drift in the theory of plate tectonics. </span>
It was the most accurate calendar of the time!
