Final answer:
Many American Indians living in Georgia at the time of European contact used circular fortifications made from mud and clay as their shelters, such as the ones built by the Ancient Puebloans.
Step-by-step explanation:
At the time of European contact, many American Indians living in Georgia used circular fortifications made from mud and clay as their shelters. These circular fortifications provided protection from outside threats and were easily accessible through ladders or ropes. Examples of such fortifications can be seen in the structures built by the Ancient Puebloans, who lived in towns organized around large plazas and constructed multi-storied apartment-like buildings.