The amazon river is mostly far inland and goes threw the very unpopulated amazon rain forest. Most people live on the coast because it was the first place that was settles (just like how the north east USA is heavily populated due to it being the first place settled) and its on the coast witch has many reasons people like to live there.
An ox bow lake is formed from the deposition of sediment in the curve of a river. As the curve fills up with more sediment, it is eventually cut off from the rest of the river, forming a lake
