In "The Contendings of Horus and Seth", Horus' victory over Seth did more than just symbolizing how the son of Osiris beat his uncle to became the new ruler of Egypt.
This mythological tale - at its core - served as a way to establish the kingship system (A hereditary monarchy) at the time, while also showcasing the way that society was conceived (As a world of deities and human beings).
Considering this, the answer is option 4) "His victory united the kingdoms of Egypt and ushered in an era of peace and prosperity. From that day forward, the people of Egypt considered each pharaoh to be Horus in the form of a human."
