For all paraphrased and summarized content, the citation must include a. author(s)' last name(s) and the page or paragraph number b. the date of publication and page or paragraph number c. author(s)' last name(s) and the date of publication d. title of the document and the author(s)' last name(s)

a. author(s)' last name(s) and the page or paragraph number

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.