Final answer:
The Chaco Anasazi people likely migrated due to drought, religious turmoil, and the presence of new peoples in the area.
Explanation:
The suspected reason why the Chaco Anasazi people migrated away from their pueblos by the 1200s was drought. Archaeological evidence and historical accounts suggest that a prolonged period of dryness and lack of resources may have led to their migration southward to join other Pueblo cultures like the Hopi and Zuni. Additionally, religious turmoil and the arrival of new peoples in the area also played a role in their abandonment of the pueblos.
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