Final answer:
Repetition is the poetic device used in the phrase 'smile and smile and smile.'
Explanation:
Repetition is the poetic device used in the phrase 'smile and smile and smile,' where the repetition of the word 'smile' creates emphasis and rhythm in the poem. This technique enhances the meaning of the phrase, highlighting the action of smiling multiple times.
Learn more about Poetry devices here:
https://brainly.com/question/30240756
