Concept:A metaphor directly equates two unlike things without using “like” or “as”.
Explanation:The poet says, “my dream is a hornbill” and “my dream is a locked-up serenade”.
These are direct statements that compare a dream to a hornbill and to a locked-up serenade.
No connective word such as “like” or “as” is used in these comparisons, making them metaphors.
The earlier phrase “like a rose” is a simile, but the central device in the passage is the repeated direct identification.
The hornbill is described as “flightless and tottering”, and the serenade is “locked-up”, showing that the dream remains unfulfilled.
Answer:D. Metaphor