Final answer:
The bolded lines in Emily Dickinson's poem use slant rhyme, where the end consonants match but not the vowels, creating an imperfect rhyme that adds to the poem's lyrical quality.
Step-by-step explanation:
The bolded lines in Emily Dickinson's poem A bird came down the walk exhibit the use of slant rhyme. Slant rhyme, also known as half rhyme or near rhyme, is where the end consonants of words are similar but the preceding vowels are not, creating a partial or imperfect rhyme. In this poem, words such as 'raw' and 'dew' or 'grass' and 'pass' do not have an exact matching sound but share similar consonants or assonant qualities, creating a rhyme that is not quite exact. This type of rhyme scheme adds to the lyrical quality of the poem while giving it a more conversational tone.