Why did shakespeare’s noble characters speak in iambic pentameter whole commoners spike mainly in black verse or pose?

Read the selection below and answer the question. an open boat by alfred noyes o, what is that whimpering there in the darkness? 

 'let him lie in my arms. he is breathing, i know.
 look. i'll wrap all my hair round his neck' – the sea's rising,
 the boat must be lightened. he's dead. he must go.' 


 see - quick - by that flash, where the bitter foam tosses, 
 the cloud of white faces, in the black open boat, 
 and the wild pleading woman that clasps her dead lover 
 and wraps her loose hair round his breast and his throat.
 'come, lady, he's dead.' - 'no, i feel his heart beating,
 he's living, i know. but he's numbed with the cold. 
 see, i'm wrapping my hair all around him to warm him.' -
- 'no. we can't keep the dead, dear. come, loosen your hold.

 'come. loosen your fingers.' - 'o god, let me keep him! ' -
 o, hide it, black night! let the winds have their way! 
 and there are no voices or ghosts from that darkness, 
 to fret the bare seas at the breaking of day. the rhyme scheme of "an open boat" is abcb abab abba aabc

What does the duke reveal about himself to the reader as he speaks in “my last duchess” by robert browning? that he is a believer in romantic love that he is a calculating villain that he is a trustworthy husband that he is a sophisticated man worthy of respect

In keats's "ode to a nightingale," to which of the following methods does keats not turn in his attempt to reconnect imaginatively with the "melodious bird"? - poetry - white wine - opium - sparkling red wine