What type of government developed Egypt after 3100 BC.?

Pharaoh held absolute authority.

Explanation:

The period after 3100 B. C. is known in the history of ancient Egypt as the "Old Country". The ruler not only had political authority but was considered the embodiment of Horus and Ra, therefore, he was considered a deity. All the land in Egypt belonged to him.

Since it was not easy to rule alone, the Egyptian ruler, by his own will, chose a man who was in charge of certain administrative affairs, and his name was "Dad." That person was always someone from a ruler's family.

In addition to the aforementioned in the Old State period, there were several state actors, administrators, scribes, who together formed part of the Egyptian administration.