How is a four-measure answer phrase characterized in relation to a given question phrase?

A four-measure answer phrase is characterized as forming a parallel period in relation to a given question phrase. In music, a parallel period consists of two phrases: the first, known as the antecedent (the question), and the second, known as the consequent (the answer). Each phrase typically shares similar melodic material, but often starts on a different note or concludes in a different way to create a sense of resolution.

In the context of a parallel period, the four-measure answer phrase typically mirrors the structure of the question phrase while providing slight variations, ensuring that both phrases resonate with each other effectively. This structural design enhances the musical conversation between the phrases and reinforces the relationship and development of musical themes.

The other options do not specifically capture the essence of how a four-measure answer phrase relates to a question phrase. Creating a sequence in a major key refers to the repetition of a musical idea at different pitch levels, while utilizing disjunct motion implies a focus on larger intervals rather than the melodic material's relationship. Developing a contrasting phrase suggests a departure from the thematic material of the question phrase, which would not maintain the parallel nature essential to forming a parallel period.