Respuesta :
Answer: Chemical dumping into a river by a factory
A point source pollution results when the pollutants comes from a single source. In point source pollution the site of origin of pollution can be identified. A point source pollution can be prevented and controlled by preventing the flow of source contaminants.
Chemical dumping into a river by a factory is an example of point source pollution because the source of pollutant (chemical) is known that is factory.