I think it is e because A dependent clause is a group of words with a subject and a verb. It does not express a complete thought so it is not a sentence and can't stand alone.
I think it is assonance because assonance is the repetition of vowel sounds to create internal rhyming within phrases or sentences
Yes, because they give off unhealthy fumes that go into our atmosphere and harm our environment.
The last one. The only scenario where you wouldn't put a comma in the first quote is if it's a completed remark that uses particular punctuation such as a quotation or exclamation mark, but never a period. Hope this helped.