Choose the item that uses a comma or commas correctly.
andrew carnegie famous for the thousands of libraries he built made his fortune in the steel industry.
andrew carnegie famous for the thousands of libraries, he built, made his fortune in the steel industry.
andrew carnegie, famous for the thousands of libraries he built, made his fortune in the steel industry.

Andrew Carnegie, famous for the thousands of libraries he built, made his fortune in the steel industry.

Explanation:

The phrase separated by the commas from the rest of the phrase gives a bit of unnecessary information. The fact that the sentence could make sense without the separated phrase means the commas were used correctly.

adverb is the answer i believe.

the answer is:

when will (v) the books (n) be (v) due?

nouns refer to people (other than pronouns), places and things, whereas verbs describe actions and are usually part of the predicate of a sentence. finally, pronouns can work as nouns and identify the participants in speech.

in the example sentence, "will" is a verb part or auxiliary verb, "be" is an infinitive verb and "books" is a plural noun.