Question

question 9
select the example of a point source of water pollution.
a company maintains its vehicles by using a special chemical that washes into a nearby stream.
a river is polluted with runoff of fertilizers used on local homeowners lawns.
after a snowfall, a highway is treated with salt and some of the salt seeps into the groundwater.
a thunderstorm clears oil and grease from a parking lot.

Explanation:

A point - source pollution comes from a single, identifiable source. In the given options, a company using a special chemical that washes into a nearby stream is a single, identifiable source of pollution. The other options involve diffuse sources like runoff from multiple lawns, salt from a large - area highway treatment, and storm - related runoff from a parking lot.

Answer:

A. A company maintains its vehicles by using a special chemical that washes into a nearby stream.