Answer:
D. Rivers
Explanation:
I am currently learning about this in my AP World History class!
The fertile crescent is on some really fertile ground. You can't have fertile ground without a source of water. The Nile is a specific river than is in the fertile crescent, in fact, many in 3000BCE Ancient Egypt would study when it would flood because the floods created more fertile soil. These rivers provided for 100's maybe 1000's a day and kept agriculture boomin'.
Hope I helped!! :))
It helped the US economy and increase in population since it manufactured the US with different amounts of data and tools.
Mona Lisa for paintings
David by Michealangelo for sculptures
The Prince for books
The pulley for inventions
hope this helps
