River systems were important to the development of the United States because they (1) allowed Americans to travel easily between the east coast and the west coast
(2) prevented foreign invasion of United States territory
(3) provided routes for shipping agricultural and manufacturing products
(4) made the southeast the major destination for immigrants

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.

answer; biological;