The statement that accurately describes the Mississippian people and the Ancestral Puebloans is:
The Mississippian people lived in a region with a wet climate, whereas the Ancestral Puebloans lived in a dry climate.
This statement correctly reflects the environmental contexts of both groups. The Mississippian culture thrived in the Mississippi River Valley, which had a wet climate suitable for agriculture, while the Ancestral Puebloans lived in the southwestern United States, an area characterized by arid conditions.