Rivers are lifelines in many dry regions of Africa. They provide the necessary water for agriculture, household uses, transport, and biodiversity. They fill the wetlands of inland and coastal deltas with fresh water, thereby maintaining the inhabitant’s livelihoods and biodiversity of these dynamic areas
Longitude is the measurement east or west of the prime meridian. (Imaginary lines that run around the Earth vertically. up/down.)
Minnesota, Wisconsin , iowa, Illinois, missouri, kentucky, arkansas, tennessee, lousiana, mississippi
hope this helps :)
0,1,1,2,3,3,4,4
this would be proper set notation