why is the delta region to the north called “lower egypt”?

The delta region to the north is called "Lower Egypt" because of the direction of the Nile River flow. The Nile flows from the higher elevations in the south to the lower elevations in the north, emptying into the Mediterranean Sea. Thus, the northern delta region is geographically lower in elevation and downstream compared to southern Egypt, which is called "Upper Egypt." This naming convention follows the natural flow of the river, with Lower Egypt being the downstream northern part where the Nile spreads into the fertile delta before reaching the sea. The ancient Egyptians themselves referred to this northern region as "north" or the Land of the Papyrus, while Greeks and Romans later adopted the terms Lower Egypt or Aegyptus Inferior for it.