$611, lower, and $819. i had to learn the hard way.
Answer:desserts
Explanation:Vast deserts border the Nile to the east and west.
With respect to trade, caravan routes were linked to overseas trading networks, forming a great web for the transportation of good that knit together the "world economy" of the Islamic Empire.
The answer is Michael Eugene Porter.
He was still a young associate professor at Harvard Business School when he published this research and it was highly influential. Porter's Five Competitive Forces that Shape Strategy is a tool used to analyze competition of an industry. His research was published in 1979.
