Question

non - point source pollution
pollution comes from various factors like runoff, precipitation, and drainage.
pollution is a complex issue. it results from different sources, making it hard
non - point pollutants like pesticides, gasoline residue, and oil leaks from parking
can contribute. in rural areas, its linked to sediment, fertilizer, and
from agriculture. confined cattle operations can cause pollution during heavy
by flooding dirt areas with animal waste accumulated there. non - point source
includes oil, grease, sediment, acid drainage from mines, toxic chemicals, and more.
why is it challenging to address non - point source pollution?
because it is visible and easy to pinpoint
because its only caused by urban pet waste
because it comes from multiple sources that are hard to pinpoint

Explanation:

The text states that non - point source pollution "results from different sources, making it hard". This indicates that the challenge lies in the multiple and hard - to - identify sources. The first option ("because it is visible and easy to pinpoint") contradicts the text. The second option ("because it's only caused by urban pet waste") is incorrect as the text mentions multiple sources like runoff, pesticides, etc., not just urban pet waste. The third option aligns with the text's description of multiple sources being hard to pinpoint.

Answer:

because it comes from multiple sources that are hard to pinpoint