Which figure of speech does the speaker in poem use to emphasize why he longs to be at sea?

The right answer for the question that is being asked and shown above is that: "A. alliteration." The figure of speech does the speaker in poem use to emphasize why he longs to be at sea is that A. alliteration

Here are the following choices:

A. alliteration B. onomatopoeia C. repetition D. assonance