Question

Which of the following is the most probable explanation for the American Indian migration?

We don't know.
They used the Bering Land Bridge.
People traveled from Northern Asia to North America by boat.
There was no need for them to migrate because they were already here.

Answer 1

They used the Bering Land Bridge.

Step-by-step explanation:

Since all humans were not originally American continent, they had to find a way to migrate there. There just happened to be a land bridge connecting Alaska and Siberia, so the American Indians crossed it to get into the Americas. There were no cars, no boats, or anything advanced at all to help them get into the Americas.