Which of the following sentences contains an idiom

idioms mean as they say just a bit of an exaggeration

Explanation:

For example “cat got your tounge?” Meaning can’t you speak. Things like these are idioms. Hope this helps! Since there isint an image.

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.