Answer:
While there are many theories about how exactly Native Americans came to the Americas, the most widely accepted theory is that there was once a land bridge that connected Asia to the US, and nomadic people crossed it, and, over time, it eroded and vanished.
The Natives were conquered for two reasons: Diseases such as smallpocks or maralaria killed so many of them that they were physically incapable of fighting back against the large numbers of Eurpoean settlers, and the European's had greater weaponry then the Natives.
Explanation:
