Short answers, pulled from the story.
Lower Egypt is the northernmost region of Egypt located between Upper Egypt and the Mediterranean Sea. The Nile River split into seven branches as it reached this area, though today only two principal channels flow through the delta at Rashid and Damietta.
Neolithic societies along the Nile River raised crops and domesticated animals by approximately 3600 BC. These cultural advances occurred before 3600 BC when Lower Egypt began advancing as a civilization with distinctive pottery and extensive copper use.
King Narmer defeated his enemies in the Delta during his reign in Upper Egypt to merge the kingdoms of Upper Egypt and Lower Egypt. The Narmer Palette commemorates the defeat of Lower Egypt showing Wash being bluedgeoned by Narmer.
The capital of Lower Egypt was Memphis where Wadjet served as its patron goddess depicted as a cobra. Inebu-hedj also functioned as the capital for the White Walls district where Ptah resided.
Lower Egypt divided into twenty districts called nomes with el-Lisht designated as the first district. Each nome housed specific deities such as Horus in Khem or Letopolis and Hathor at Imu or Apis located at Kom el-Hisn.