Answer:
Part A: "And then my heart with pleasure fills, / And dances with the Daffodils."
Part B: It creates a cheerful mood that helps readers understand how the natural world can inspire feelings of joy.
Step-by-step explanation:
Part A: As the speaker watches and interacts with the daffodils, their heart is overflowing with happiness and joy, expressing their emotional reaction to the beauty of nature.
Part B: A positive vibe is created by the picture of daffodils dancing in the breeze, emphasizing the joy and life that nature can provide with its carefree and vibrant atmosphere.