-> The author uses a specific figure of speech to prove her point.
A figure of speech is "a word or phrase used in a non-literal sense for rhetorical or vivid effect" (Oxford Languages).
Examples include those such as similes, alliteration, onomatopoeias, and more.
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather