Answer:
the mountains are rock and take longer to destroy flat ground consist of dirt which can easily be destroyed and moved
Explanation:
hope this helps
Because of pangea<span> we are certain that there was no land bridge. pangea was supercontinent that existed during the late Paleozoic and early Mesozoic eras. It assembled from earlier continental units approximately 300 million years ago, and it began to break apart about 175 million years ago.</span>
