I think its an Idiom. I don't see like or as. So no simile. I don't see he is something like a marshmallow. - No metaphor. I also don't see a non-human thing doing human things- the grass was dancing in the wind. My answer would be an idiom.
Hope this helps!
1 is balanced 2 is unbalanced 3 is unbalanced 4 is balanced 5 is balanced
Answer:
The biwa has a shallow, rounded back and silk strings (usually four or five) attached to slender lateral pegs. The instrument is played with a large wedge-shaped plectrum called a bachi. The strings are tuned in fourths, and the melody is played almost exclusively on the highest pitched string.
