The principle difference between point source and nonpoint source water pollution is
a. whether the pollution is organic or inorganic
b. the number of sources of pollution
c. the amount of pollution
d. whether it is from commercial or agricultural sources

Option B

The principle difference between point source and nonpoint source water pollution is  the number of sources of pollution

Point source pollution happens principally from industrial pieces of equipment and public wastewater processing plants. Nonpoint-source pollution is more difficult to recognize and harder to inscribe. It is pollution that originates from various places, all at once.

Nonpoint source pollution may descend from numerous diverse sources with no particular solution handy to improve the obstacle, causing it hard to control. The impacts of nonpoint source pollutants on particular waters change and may not forever be completely exacted. All of the aforementioned pollutions are possible to deviate up in rivers, streams, and lakes.

Mine too but I ask a new question and sometimes it say that the question is already asked. Its so weird.

Explanation: