Crash Course World History: Indus Valley 1.According to John Greene, all of the following are symptoms of civilization except:
A. food surpluses
B. cities
C. writing
D. language

2. 5,000 years ago almost all civilizations were associated with rivers.
A. True
B. False

3. When rivers flood they deposit nutrient rich soil called .

A. clay
B. sand
C. silt
D. dirt

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Explanation:

the answer is solomon northrup. he was a free-born african american, abolitionist and professional violinist that was drugged, kidnapped and sold as slave in 1841 and remained in captivity until 1853 where he regained his freedom with the of the then-governor of new york, washington hunt. he wrote and published his memoirs "twelve years a slave" in 1853, and in this text, he tells the story of his escape thru one of louisiana's swamps (the great pacoudrie swamp) in which he ended up covered in green slime from crossing the surface of the dead water.