Concept:The poem conveys the speaker's deep pain from loving someone who does not return his affection.
Explanation:The speaker describes poison ivy as a rose, meaning the love appeared beautiful but was actually harmful.
He liked it and dared to touch it, while his friends watched "with green and frosty eyes."
This suggests that others noticed his attraction with disapproval or cold jealousy.
The girl then flew away "over the rising moon," moving far beyond his reach.
His dream is now a hornbill that is "flightless and tottering," symbolising a love that cannot soar or succeed.
He admits that his "dream remains a dream still" and becomes a "locked-up serenade."
These images show that the love is trapped, one-sided, and impossible to realise.
Answer:D. Unrequited Love