hi! i've worked on this poem before, and what they're asking is where is hope? where does it come from?
the poem says the bird (hope) "perches in the soul" meaning that it's always there.
the answer is that hope lives in your soul. its always there, and you can always feel it, and it just exists. it doesn't need to be justified or explained, it's a feeling. and it doesn't ask for anything in return, its there when you need it. (try to rephrase this, don't copy it word for word, i'm just trying to explain it to you)
hope this helps!! :)