I'm stuck on a question!

In "I died fir Beauty" the reader is left with the impression that the moss is actually the only thing alive. What device does dickinson use?

Onomatopoeia
Irony
Dissonance
Assonance
please help!

I wouldn't usually call that irony, but of those choices, that's the only possible one.

Well that poem does make use of a fair bit of assonance.

Also, it's better to ask your teacher when you have a question like this :p

So what was the right answer??