Final answer:
The question deals with the literary devices of alliteration, the repetition of consonant sounds at the beginning of words, and consonance, the repetition of consonant sounds at the end or middle of words, both of which contribute to the rhythm, mood, and thematic emphasis in poetry and writing.
Step-by-step explanation:
The topic of the question is related to literary devices, specifically alliteration and consonance. Alliteration is the repetition of consonant sounds at the beginning of words, as in the phrase "silly snakes slither silently," creating a rhythmic and sometimes tongue-twisting effect. Consonance is the repetition of consonant sounds at the end or middle of words, such as "the slithering snake shakes its little rattle," which can add musicality or emphasis to a piece of writing.
Both alliteration and consonance are used by poets and writers to add depth, rhythm, and emphasis to their work, enhancing the reader's experience and engagement with the text. In poetry, they contribute to the overall sound and mood of the poem, and can be used to draw attention to certain themes or ideas.
Assonance: Assonance is the repetition of vowel sounds within a word. Edgar Allan Poe's poem "Once upon a midnight dreary, while I pondered weak and weary..." contains an example of assonance.