Answer:
Asia
Step-by-step explanation:
It is commonly accepted by scholars that they crossed a land bridge that once connected Asia and North America, called Beringia, during the last Ice Age, which occurred about 20,000 years ago. This land bridge was exposed due to lower sea levels caused by the accumulation of water in glaciers during the Ice Age. The first immigrants are believed to have been nomadic hunter-gatherers who eventually spread across the Americas over thousands of years, adapting to different environments and developing unique cultures and civilizations.