Final answer:
The answer to which option is a nonpoint source of pollution is b, 'Animal waste from wildlife,' as it represents a diffuse source of pollution rather than a specific, single point of contamination.
Step-by-step explanation:
You asked which option is considered a nonpoint source of pollution. A nonpoint source of pollution is contamination that does not originate from a single, identifiable source. Instead, it occurs when small amounts of contaminants from large areas accumulate and find their way into water bodies. This can include runoff from agricultural fields, cities, and even natural processes such as animal waste from wildlife. Therefore, option b, 'Animal waste from wildlife', is the correct answer as it represents a diffuse source of pollution that cannot be traced back to a single point, contrasting with point sources like a hazardous waste site or a specific chlorine spill.