Which term refers to the similarity of vowel sounds or repetition of consonant sounds in close proximity?

The correct term that refers to the similarity of vowel sounds is "assonance." Assonance specifically describes the repetition of similar vowel sounds within close proximity in a line of text, which can create a musical quality and enhance the emotional resonance of the language.

This technique is often used in poetry and prose to build rhythm, mood, or to connect ideas through sound. For example, in a line where the vowel sounds 'a' in "had" and "sad" are repeated, it illustrates assonance.

Understanding this term is crucial for analyzing how sound contributes to meaning and tone in literature, which is key in NCEA Level 3 English assessments. The other options, while they pertain to literary devices, do not fit the definition of repeated vowel sounds. Alliteration focuses on the repetition of initial consonant sounds, hyperbole is an exaggerated statement not meant to be taken literally, and diction refers to the choice and use of words in speech or writing.