When are commas normally used? Select three options. after introductory phrases and clauses around restrictive phrases and clauses around nonrestrictive phrases and clauses before the conjunction joining independent clauses before the conjunction introducing a dependent clause

Your Answer is 1, 3, and 4

Explanation:

After the introductory phrase, 3) Around Nonrestrictive Phrases and Clauses, and 4)  Before the Conjunction Introducing an Independent Clause

Nonrestrictive phrases and clauses are a way to add extra information to sentences. Really important that you know the difference that it's adding extra information.

(Thats the only note i took but I just took the quiz and passed)

answer: b (host)

viruses use the cells of living organisms to reproduce. the cell which is used by virus is called as "host cell". it is a living cell in which virus multiplies, example bacteria, plant or an animal cell.

in this, the virus is a parasite, which uses host cell for its benefit (reproduction) by using the cell machinary of host cell.