If the river is left alone, how might the river appear 50 years from now?

The river would most likely look old and nasty all the water would have been evaporated from the river

The river might/will erode, that makes it large or even deeper, maybe looking dry or empty. 

He was very egry and lowselfof steam

The answer to this question is  c. pharmaceutical accumulation  reclaimed water refers to the water that being used again after it already  used for agricultural purposes.this type of water often contains pharmaceutical accumulation because of the chemical fertilizer that is used for the plants is absorbed into the water.