Final answer:
The Nile River is compared to the lifeblood of Egyptian society, both in ancient times with its predictable floods that enabled a prosperous civilization and, in modern times, as a crucial agricultural resource.
Step-by-step explanation:
The Nile River has been crucial to the development of civilization in Egypt, serving as the lifeblood of the region. With its predictable flooding patterns, the Nile enabled ancient Egyptians to establish a structured, urbanized civilization, evidenced by grand constructions like the pyramids and the Sphinx. Additionally, the fertile lands created by the annual floods allowed for substantial agricultural production, which was the foundation for this historically stable society. Modern Egyptian society continues to rely on the Nile for agriculture, although changes such as the Aswan High Dam have altered the natural rhythm of the river, affecting both soil quality and the traditional way of life along its banks.