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!
A paragraph in an essay and NOT an example of insertion.
A triangle is equilateral if and only if the triangle is equiangular.
<span>or: A triangle is equilateral <-> the triangle is equiangular. I hope this answer helps. Looking forward to help you again. Have a great day!</span>
Analogy would be the correct answer
