Final answer:
The speaker's heart personified as dancing with the daffodils shows an emotional connection and joy at the memory of the flowers.
Step-by-step explanation:
The personification of the speaker’s heart in the text indicates that the speaker experiences immense joy at the memory of the daffodils. Describing the heart as dancing with the daffodils suggests a deep connection with the natural world and reflects the happiness the speaker feels by recalling this memory. The vivid imagery and emotional language highlight the personified elements, creating a blend where human emotions are reflected in nature and vice versa, implying a sense of harmony and unity with the natural environment.