Answer:
the Anasazi
Step-by-step explanation:
Anasazi is one of the North American tribes that inhabited the place. Huge and magnificent cities were built by the Anasazi inhabitants. Etymologically, the word 'Anasazi' implies the "ancient outsiders". The inhabitants were proficient in growing crops and making pottery. The reason for the decline of civilization is estimated to be the attacks by the other tribes. While some historians predict that the exhaustion of the resources would be the reason for the decline.