Final answer:
Ancient Egypt and Nubia had access to natural resources such as nutrient-rich soil from the Nile's floods, water for irrigation, gold, minerals, and a population capable of farming and building their civilizations.
Step-by-step explanation:
Ancient Egypt and Nubia had access to various natural resources that were vital for their development. Some of these resources included the natural fertilizer provided by the Nile's flooding, which enriched the soil and prevented salinization, ensuring productive agriculture. The Nile River itself was another crucial resource, providing water for both daily use and irrigation. Moreover, the regions were rich in minerals, with gold being a significant commodity, especially in Nubia. Besides these natural resources, the populations of Egypt and Nubia were also essential in cultivating the land and maintaining the civilizations.