What is the primary reason the Nile River Valley has the greatest concentration of population in Egypt?

The Nile River Valley has the greatest concentration of population in Egypt primarily due to its high-quality agricultural land. The fertile soil along the banks of the Nile, enriched by annual flooding, creates ideal conditions for agriculture. This abundance of productive land supports the cultivation of a variety of crops, making it essential for sustenance and economic activity. As a result, communities have historically settled in this area, drawn by the opportunity to grow food and sustain larger populations.

While access to urban areas, proximity to trade routes, and availability of freshwater sources are important factors in population distribution, none provide the same crucial direct impact on daily sustenance and economic production as the fertile agricultural land does. The Nile's agricultural productivity has historically been the backbone of Egyptian civilization, influencing settlement patterns and population density in the region.