Final answer:
We can conclude that the use of the Nile River for transportation and trade significantly contributed to the prosperity and advancement of ancient Egyptian civilization.
Step-by-step explanation:
Based on the passage, we can conclude that the development of trade along the Nile River was significant in the advancement of ancient Egyptian civilization. While initially the Nile was primarily a source aiding in agriculture, the Egyptians later harnessed it for transportation, which facilitated the exchange of goods and ideas with other communities. This diversification of economic activities allowed ancient Egypt to enjoy prosperity and reduced its dependence on agriculture alone. It is inaccurate to claim that Egypt ceased agricultural activities or that they had no knowledge of road construction; rather, the use of the Nile for transportation was an innovative development that spurred growth and exchange.