Final answer:
The bird sculptures at Great Zimbabwe, built by the Shona people, mainly symbolize power and the celestial realm acting as messengers between the earth and astrology.
Step-by-step explanation:
The sculptures at Great Zimbabwe, which was constructed by the Shona people, are most closely associated with being symbols of power. The bird sculptures found in this ancient city represent the celestial realm and are considered to be messengers between the earthly domain and the astrological events in the sky. These birds, especially when found on artifacts such as a tripod vessel with a bird figure, signify the connection with cosmic forces and have a shiny appearance, signifying their importance. However, the structures at Great Zimbabwe and the artifacts found within them have sparked various interpretations, some suggesting their role in ancestor worship or as protectors of the land.