What form of expression is primarily used in the Navy Hymn?

The primary form of expression used in the Navy Hymn is lyrics. Lyrics are the written text of a song, typically structured with a rhythm and rhyme scheme that is meant to be sung. The Navy Hymn, known as "Eternal Father, Strong to Save," conveys deep emotions and sentiments associated with devotion, honor, and the calling of service members to safeguard lives at sea. Its lyrical composition allows for these expressions to resonate musically, enhancing the emotional impact when performed during ceremonies and memorials.

In contrast, prose, dialogue, and narrative are forms of written or spoken expression that do not align with the musical and rhythmic qualities inherent in lyrics. Prose refers to ordinary written or spoken language without metrical structure, dialogue is a conversation between characters, and narrative involves storytelling. None of these elements are characteristic of the Navy Hymn, which is specifically crafted to be sung and embodies the lyrical tradition typical of hymns.