Humans affect watersheds in both positive and negative ways. Arrange the series of events that human
habitation of a watershed would follow, in the most logical order that they would occur:

Downstream, wetlands begin to disappear because of excess sediment and pollution.
Humans move to a floodplain and plant crops in the fertile soil.
Humans recognize their impact and begin restoration efforts, strengthening river banks and getting rid of the
pollution.
The community grows, and pollution and erosion start destroying the river.
The river slowly works its way back to a state similar to its original state, and wetlands begin to re-grow.