The question asks about the literary device used when consonant sounds are repeated in poetry and prose. Let's examine the options provided to determine the correct term.

Understanding Literary Sound Devices

Literary devices are techniques used by writers to create special effects or enhance their writing. Sound devices are a specific type that focuses on the sounds of words, adding rhythm, musicality, or emphasis to text, particularly in poetry but also in prose.

Analyzing the Options

• Pun: A pun is a play on words that have similar sounds but different meanings, or words with different meanings that are alike in sound. It's based on ambiguity of meaning, not the repetition of consonant sounds.
• Irony: Irony is a literary device where the intended meaning is different from the actual meaning. It often involves a contrast between expectation and reality. It is not related to the repetition of consonant sounds.
• Alliteration: Alliteration is the repetition of the same beginning consonant sound in words that are close together. For example, "Peter Piper picked a peck of pickled peppers" shows the repetition of the 'p' sound. This definition directly matches the description in the question.
• Accent: Accent refers to the emphasis placed on a syllable within a word or a word within a sentence. In poetry, accent is related to meter and rhythm, not specifically the repetition of consonant sounds.

Why Alliteration is the Correct Term

Based on the definitions, the repetition of consonant sounds, especially at the beginning of words, is precisely what alliteration is. It's a common sound device used to create rhythm, mood, and emphasize certain words or phrases in both poetry and prose.

For instance, in the phrase "slippery slope," the repetition of the 's' sound is an example of alliteration. Similarly, in "bold knight," the repetition of the 'b' sound is alliteration.

Therefore, the term that describes the repetition of consonant sounds in poetry and prose is Alliteration.