Not 100% sure, but in my opinion I would say B. Personification.
From the options listed the strategy that would be least useful for helping students monitor comprehension of a text as they are reading is (A) breaking long sentences into short phrases
This option does not seem the most effective since it is a simplification or summary of sentences and the simplification does not always imply apprehension nor a correct hierarchization of the text.
Pain in a specific part of the body
I am pretty sure that device which is used to add emotional intensity in the excerpt is repetition. As for me, such appeal to captain is used to persuade the reader to pay attention and create <span>thrilling tone. I hope you find it helpful.</span>
-Mental
-Physical
I can’t think of a third one sorry