Which sentence uses the past participle form of the verb draw?

a.
the artist had drew her sketches with a charcoal pencil.

b.
the artist had drawn her sketches with a charcoal pencil.

c.
the artist drew her sketches with a charcoal pencil.

d.
the artist is drawing her sketches with a charcoal pencil.

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

chemical because it warmed up which involves temperature and it bubbled which includes changing

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