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!
Do you think you can expand your question to see if j can respond to this?
Answer:b
Explanation:it’s talks about how they made the mask
Anti would be against , i think non would be not
