Question: what were the 3 major native american civilizations in north america

title: Pre-Columbian era
text: The Valdivia culture was concentrated on the coast of Ecuador . Their existence was recently discovered by archeological findings . Their culture is among the oldest found in the Americas , spanning from 3500 to 1800 BCE . The Valdivia lived in a community of houses built in a circle or oval around a central plaza . They were sedentary people who lived off farming and fishing , though occasionally they hunted for deer . From the remains that have been found , scholars have determined that Valdivians cultivated maize , kidney beans , squash , cassava , hot peppers , and cotton plants , the last of which was used to make clothing . Valdivian pottery initially was rough and practical , but it became showy , delicate , and big over time . They generally used red and gray colors ; and the polished dark red pottery is characteristic of the Valdivia period . In its ceramics and stone works , the Valdivia culture shows a progression from the most simple to much more complicated works . Cañaris