Final answer:
The Nile River is predictable and the Ancient Egyptians knew when it would overflow.
Step-by-step explanation:
The subject of this question is History. The grade level is Middle School.
The correct statement about the Nile River is that it is predictable and the Ancient Egyptians knew when it would overflow. The regular flooding of the river was essential for their agriculture, as it would deposit rich silt on the riverbanks, allowing them to grow crops.
For example, the Ancient Egyptians used a Nilometer, which was a device to measure the water level of the Nile. This helped them predict the flood and determine the best time for planting their crops.
Learn more about Nile River flooding