key:

Word with red colour =Alliteration

Word with blue colour =simile

Word with green colour =Rhyme

explaining that there is a iambic pentameter

 

The stanza:

Down dropt the breeze, the sails dropt down,

Twas sad as sad, sad as sad could be;

And we did speak only to break,

The silence of the sea.

There is a iambic pentameter which is describing the effect of the wind on the emotions of the sailors.