Answer: A desire for peace? I think.
The tense plot or the heart stopping danger. <span />
It would be to persuade if you remember PIE (persuade, inform entertain).
The word thwart can be defined as “prevent (someone) from accomplishing something” so i believe it is B “imprisoned by the waves”
Another perspective of the poem could what the girl is thinking, or what the lady at the store is thinking or said, or even a father or stranger that had contact (just talked to them) with them for a bit.
