Final answer:
Egyptian crops were brought to the Nile from the East, mountains, due to the fertile soil provided by the river's annual floods.
Step-by-step explanation:
Egyptian crops were brought to the Nile from the East, mountains. The Nile River, which stretches over 4,000 miles from its mouth in the Mediterranean to its origin in Lake Victoria in Central Africa, provided fertile soil for agriculture due to its annual floods. These consistent floods deposited mud and silt along the river banks, making the Nile region one of the most fertile in the world. The crops were likely brought to the Nile from the eastern mountains, where water sources and fertile land could have supported agricultural development.