Final answer:
Factual statements about Egyptian civilization include its development along the Nile River banks, the influence of the Nile's fertile plains on the civilization's growth, and its recognition as one of the oldest human civilizations by historians.
Step-by-step explanation:
The sentences in the passage that make factual statements about Egyptian civilization are: "Egyptian civilization developed along the banks of the Nile River" and "The fertile plains near the Nile helped the civilization grow." These statements are supported by historical evidence and research that indicates the significant role that the Nile River played in the development of Egyptian civilization. The Nile's predictable flooding patterns created fertile land that supported agriculture, which in turn sustained the civilization. The third sentence, "Some historians believe that it is one of the oldest human civilizations," is also a factual statement given the consensus among historians regarding the ancient origins of Egyptian civilization, dating back to the fourth millennium BCE.