What is the leading theory about how early humans arrived on the American

continents?

I can give you all the answers

1. They walked from Asia to North America over a strip of land that has since been covered by the ocean.
2. Farming encouraged native cultures to build more permanent shelters and communities.
3 (two answers). They were advanced in mathematics and astronomy. + They built magnificent cities and stone temples.
4. the eastern woodlands of North America
5. Lakotas

The leading theory about how early humans arrived on the American continents is the Bering Land Bridge theory. According to this theory, it is believed that around 15,000 to 30,000 years ago, a land bridge called Beringia connected Asia and North America. This land bridge emerged as a result of lowered sea levels during the last glacial period. It is hypothesized that early humans, possibly descendants of erectus or Homo sapiens, migrated from Asia across this land bridge into the Americas. As the ice age ended and sea levels rose, the land bridge was submerged, separating the populations and leading to the peopling of the American continents. This theory is supported by archaeological evidence, genetic studies, and similarities in cultural practices among indigenous populations in Asia and the Americas.