During the Mogollon 1 period, the people lived in small villages of circular wattle-and-daub pit houses, the floors of which were from 10 to 40 inches (25 to 100 cm) below ground level; entrance was usually through tunnels.
Limpopo River is a Southern African River and it does empty into the Indian Ocean: the correct anwer. Orange River flows westward, Okavango into a Swamp. - they don't empty into the Indian Ocean