Hat do the stanzas in "A Psalm of Life" have in common? They explain the different parts of a thing.
They show stages in a thought process.
They show the events of a narrative.
They display different sides of a problem.

The answer would be B.

Explanation:

In the stanzas you can tell that they start to show the stages of a thought process, for example, "Lives of great men all remind us, we can make our lives sublime, and, departing, leave behind us, footprints on the sands of time."

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.

the 2nd and 4th are correct