In this sentence from paragraph 3 of the passage, the word vieros refers to

The term virion (plural virions), which dates from 1959, is also used to refer to a single viral particle that is released from the cell and is capable of infecting other cells of the same type

it creates a visual picture of the man.

it conveys what the scene sounds like.

it describes the actions of the boy.

it reveals the poet’s opinion of the characters.

it encourages readers to care for the characters.

i could of w this question but i don't see a " passage " .

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sorry ! ):