Sonia loves writing some days the words come so easily that her words seem to dance across the page which figure of speech or literary device does the author use in the passage?

The author uses personification in the passage, as it describes Sonia's Words as if they can "dance" across the page, attributing human-like qualities to the Words. This enhances the imagery and conveys the joy and fluidity of her writing process. Additionally, the metaphor of dancing evokes a sense of grace and creativity in her expression.