What commonly signifies a turning point in a poem?

The identification of a turning point in a poem is often marked by a shift in tone or mood. This shift indicates a significant change in the speaker's emotions, perspectives, or the overall thematic direction of the poem. Such a transformation is critical because it can alter the reader's understanding or interpretation of the poem's message. For instance, a poem that starts with a tone of despair may shift to one of hope, or vice versa, which can lead to a deeper exploration of the themes being presented.

While a significant change in imagery can enhance a poem and possibly contribute to a turning point, it is the tonal shift that more directly signifies a change in the poem’s emotional landscape or narrative arc. The introduction of a new character typically pertains more to narrative poetry or storytelling within poetry, and does not universally apply to all poetic forms. Similarly, the use of rhyme and meter, while crucial to the structure and sound of a poem, does not inherently indicate a turning point in the poem's content or emotional trajectory. Therefore, the most effective identifier of a turning point is indeed a shift in tone or mood, as it encapsulates a deeper change within the piece.