Final answer:
The author's use of personification in the first stanza of the poem conveys meaning by allowing the reader to better understand how the seas look and feel.
Step-by-step explanation:
The author's use of personification in the first stanza of the poem conveys meaning by allowing the reader to better understand how the seas look and feel. The personification of the seas helps create a vivid image in the reader's mind and adds a sensory element to the description. For example, when the author describes the seas as 'tossing their heads,' it gives the impression of the waves aggressively moving and adds to the overall visual and emotional impact of the stanza.