A word or a phrase that is informal and particular to certain time periods or social situations is called:

Colloquialisms

Explanation:

Colloquialism is the use of informal language in certain time periods or social situations. In colloquialism we find slang words, foreign words, neologisms, and abbreviations.

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.