What is the definition of "alliteration" in literary terms?

The correct definition of "alliteration" involves the repetition of initial consonant sounds in close proximity within a phrase or sentence. This literary device creates a rhythmic or musical quality in writing and can enhance the mood, tone, and meaning of the text. For example, in the phrase "Peter Piper picked a peck of pickled peppers," the repeated 'p' sound demonstrates alliteration effectively. This technique is often used in poetry, prose, and tongue twisters to draw attention to the phrasing and create a memorable reading experience.

The other options describe different literary elements. The repetition of vowel sounds pertains to assonance, while the juxtaposition of contradictory terms refers to oxymoron. Long sentences, regardless of their structure or purpose, do not encapsulate any specific literary term and therefore do not fit the definition of alliteration.