The rhyme scheme of the given poem is aaaab, with the first four lines sharing the same rhyme sound and the final line having a different rhyme.
Step-by-step explanation:
The rhyme scheme of the given poem can be determined by analyzing the end sounds of each line. By assigning a letter to each unique rhyme sound, we achieve the following pattern for the poem:
Line 1: I wanted to use the mat (A)
Line 2: but couldn't remove my cat (A)
Line 3: who always sat (A)
Line 4: directly at (A)
Line 5: the place I needed to pose. (B)
The first four lines all end with words that sound the same, assigned the letter 'A', and the last line ends with a different sound, assigned the letter 'B'. Therefore, the rhyme scheme of the poem is aaaab.