Answer:
The answer should be number 3: The detective is trying to solve a crime, Mr. Macomb is a witness, and large footprints are a clue.
Explanation:
The rhyme in this poem helps create a rhythm that almost has the reader swaying. This helps the reader feel more connected to the poem and they have a better understanding of what the author is trying to say. Without the rhyming of this poem there would be no rhythm and you need both to have a great poem.
Hope this helps!