Answer: The point source pollution has only a single source. The nonpoint source comes from many diffuse sources. The nonpoint source's pollution is caused by rainfall or snowmelt moving over and through the ground. It can cause problems with the quality of the water. It is caused by disconnected sources of pollution.
I would change certain laws that I thought were incorrect or unfair (though I would have to get permission from Congress first). Also, I would look at the people (citizen's of the US)'s view on things and I would help everyone to be somewhat satisfied. It would take a lot of work, however.
Sorry, I'm not sure.
I would suggest asking a trusted adult or teacher or redoing the lesson. Cheating isn't a good path: you will not do well in the future if you always search for answers on the internet.
