I think the correct answer from the choices listed above is the last option. Manure is carried by rain water from land to a river. This is an example of non-point source pollution. This type of pollution <span>is caused by rainfall or snowmelt moving over and through the ground. Hope this answers the question.</span>
A non-point source pollution is the one which originates from many sources and the origin of the sources cannot be traced back. As a result this kind of pollution cannot be controlled. A point source pollution is the one which can be traced back to it's source pollutant and a single pollutant is responsible for the pollution. It can be controlled.
The given situation is an example of non-point source pollution. As the source of manure cannot be traced back to it's origin because rainwater caused the surface runoff of the manure which get mixed with the water of river.
the reason a species is called invasive is if it is incredibly difficult to get rid of and the population is growing out of control quickly. the characteristics that was given were likewise to the behavioral problems of an invasive species.
