Which term best describes the repetition of the same grammatical structure in a series of words or phrases?

The term that best describes the repetition of the same grammatical structure in a series of words or phrases is parallel structure. This rhetorical device enhances readability and emphasizes key themes within the text by creating a rhythm and balance through similar arrangements of words or phrases.

For instance, consider a sentence that uses parallel structure: "I came, I saw, I conquered." Each clause is constructed in the same way, which provides clarity and impact. This technique is commonly used in speeches and literature to reinforce ideas and make them more memorable.

Other terms do not apply in the same way. Assonance refers to the repetition of vowel sounds in nearby words, which enhances the auditory quality of a text rather than its grammatical structure. Personification involves giving human traits to non-human elements and does not pertain to grammatical repetition. Hyperbole is an exaggerated statement meant to emphasize a point but does not focus on structural repetition. Therefore, parallel structure is the correct choice as it specifically relates to the concept of repeating grammatical patterns.