I think it is adverb clause because of the word "hardly" which emphasises the ripple of the water
Sorry I don’t know how to right a poem I don’t understand them. Thanks for the points
I think it might be d the dukes emotional state makes it difficult for him to think logically i hope i am right if not i am sorry
it is a hyperbole..
Hyperbole is when you use language to exaggerate what you mean or emphasize a point. It's often used to make something sound much bigger and better than it actually is or to make something sound much more dramatic. Hyperbole is a figure of speech.