They are antonyms. Pollute and purify are opposite meanings. Pollute means to ruin or make something unclean, while purify means removing the harmful or dirtiness out of something.
For an essay, I assume it should be third person as should the rest of the essay be.
Answer:
A Shakespearean sonnet has fourteen iambic pentameter lines divided into three quatrains and a couplet.
Explanation:
Answer: The fact that a doctor doesn't know what a Rorschach Test is
Answer:
C what he will say to the students
Explanation: There talking about anti bullying therefore we can understand there presentation is about anti bullying.