this text consists of an introduction followed by ten sections. What does each of the ten sections describe?

a Native American culture area

Explanation: The article talks about the existence of many native peoples in the American continent, before the arrival of the Europeans. The introduction of the article, gives a brief explanation of how these peoples arrived in America and spread across the continent. After the introduction, the article is divided into 10 sections that briefly describe the regions where these peoples have stabilized in North America, precisely in the USA. In summary, we can say that each section describes an area of Native American culture.