How does the image of daffodils "Tossing their heads in sprightly dance" help to convey the theme that joy can be found in experiencing the natural world. The image suggests the childlike innocence of the flowers, which only sway in this way when they are young.

The image suggests the carefree attitude that the speaker has lost now that he is an adult.

The image suggests the happiness the speaker feels when he sees the flowers moving in this way.

The image suggests the satisfaction and elation that comes from pursuing and achieving one's dreams.