Answer:
a whimsical tone
Step-by-step explanation:
The use of the adjective "little" suggests that the trout is small and fragile, while the use of the word "silver" can give the tone a sense of brightness and purity. The noun "trout" is often associated with calm and serene bodies of water, further emphasizing the gentle tone. Overall, the phrase "little silver trout" can give the tone of the poem a feeling of peace and tranquility