Question

why is it helpful to examine the tone of a sonnet?
determining how the poet feels about the subject of the sonnet is the main purpose of interpretation.
identifying the tonal patterns of rhyme and rhythm in a sonnet enables readers to correctly interpret it.
determining the speakers attitude toward the topic of a sonnet is essential to an accurate interpretation.
identifying the emotional impact the sonnet has on the reader or listener allows readers to interpret it accurately

Explanation:

Tone reveals the speaker's attitude. Understanding this is crucial for an accurate interpretation of a sonnet. It's not about the poet's feelings being the main purpose of interpretation, and tone is not about rhyme - rhythm patterns. Also, while the emotional impact on the reader is relevant, the speaker's attitude is more fundamental for interpretation.

Answer:

Determining the speaker’s attitude toward the topic of a sonnet is essential to an accurate interpretation.