Answer:
Bering Strait
Step-by-step explanation:
Due to this circumstance transpiring so long ago, it is constantly running over archaeologist studies and research. If you would like more information over why early humans migrated, research it! Archaeologists believe that early humans migrated to the Americas by crossing the Bering Strait. The Bering Strait is the narrow passage of the North Pacific Ocean, separating Russia and Alaska.
Hope this helps!