linguistics, because it is the study of language and the history of its structural change.
Exaggeration is the action of making statements that represent something as better or worse than it really is. so you would use this by saying that people exaggerate by making someone's name seem way worse than it actually is.
Loaded language or loaded words and phrases have strong emotional implications and involve strongly positive or negative reactions beyond their literal meaning. so you would use that bye people making fun of someone's names could strongly impact a person's life negatively.
A general rubric does not evaluate the supporting details in a piece of writing.
