Answer and Explanation:
The sentence that best shows the mood "cheerfulness" is:
3. The daffodils bounced to the dance of sunbeams.
This sentence evokes a sense of joy and happiness by describing the daffodils as bouncing and dancing in the sunlight. The word choice and imagery used in this sentence create a cheerful and lively atmosphere. It suggests that the daffodils are vibrant and full of life, contributing to a positive and uplifting mood.