Final answer:
Native Americans arrived in North America between 30,000 and 10,000 years ago by crossing the land bridge called Beringia, which is now submerged under the Bering Strait.
Step-by-step explanation:
The first inhabitants of the Americas, now known as Native Americans, arrived in North America between 30,000 and 10,000 years ago. They crossed a land bridge called Beringia, which connected Asia and North America at the time. Today, the land bridge is submerged under the Bering Strait.