Final answer:
Alliteration in poetry is the repetition of consonant sounds at the beginning of words to add rhythm and musicality to the verse, as exemplified in lines from other poems discussed.
Step-by-step explanation:
The alliteration in a poem refers to the repetition of consonant sounds at the beginning of words. In the excerpt provided from the poem, while not directly containing the poem 'Frogs' by Norman Maccaig, a good example of alliteration can be found in the lines from 'There Come Soft Rains' by Sarah Teasdale — like 'sallows, borne aloft Or sinking'.
Alliteration is a literary device that poets use to add rhythm and musicality to their verses, and it often enhances the overall reading experience by providing a sense of flow and cohesion. In the given example of Frost's poem, we can identify a pattern of sounds that may contribute to alliteration in lines such as 'Assorted characters of death and blight' and 'Mixed ready to begin the morning right', where the repetition of the 'b' sound can be noted.
Similarly, in the LibreTexts snippet, phrases like 'the ford when full' and 'the pheasant but cackles' demonstrate the use of this literary technique.