So when the prompt asks for 3 examples of powerful language, it's asking for something that makes an impact. It's powerful, and it make you think. Kind of like figurative language or metaphors. That's just what I think though...
Could you share what article specifically?
Mary Shelley uses a multiple narrative in Frankenstein. A multiple narrative (sometimes referred to as an epistolary narrative) uses the voices of multiple characters within the text. Epistolary narratives can also use letters (such as Walton's four letters at the opening of the novel and the letters between the Frankenstein family) to detail parts of the plot and storyline.