Final answer:
The words describing nature in lines 12-14 contribute to the tone of the passage by creating a sense of joy and vibrancy.
Step-by-step explanation:
In the poem "I wandered lonely as a cloud" by William Wordsworth, the words describing nature in lines 12-14 contribute to the tone of the passage by creating a sense of joy and vibrancy. Wordsworth uses words like "fluttering," "dancing," and "golden" to describe the daffodils, which evokes a lively and energetic atmosphere. The imagery of the daffodils moving in the breeze and the waves dancing further enhances the positive and uplifting tone of the poem.