'Fast fading violets covered up in leaves
And mid May's eldest child
The coming must-rose full of dewy wine
The murmurous haunt of files on summer eves'.
('Ode to a nightingale')
The poetic beauty of the last line owes to the use of

• A.smile
• B.onomatopeia
• C.metaphor
• D.archaism
• E.metonymy