The correct answer to this open question is the following.
This prehistoric period lasted from about A.D. 800-1600 and was characterized by complex agricultural societies that were settled in small villages. We are referring to the Mississippian period.
The Mississippian period lasted from 800AD until 1600 in the midwestern and southeastern regions of the United States territory. During these years, many Native American Indian tribes flourished. They were smart people that developed complex agriculture techniques to grow crops such as corn, squash, goosefoot, and fruits. They also were good hunters and fishermen, taking advantage of the rivers and lakes.