The statement that accurately compares the social structures of Egypt and Mesopotamia is:
Priests and priestess were closer to the pharaoh in ancient Egypt.
In ancient Egypt, priests held significant power and were closely associated with the Pharaoh, who was considered a divine ruler. In Mesopotamia, while priests also held important positions, they were not typically as closely aligned with the king or ruler in the same way as in Egypt. The other statements provided are not accurate representations of the social structures in these ancient civilizations.