What is described as the rise and fall of the voice in speaking?

The correct answer is intonation, which refers to the variation in pitch while speaking. It plays a crucial role in conveying emotion, emphasis, and meaning in spoken language. The rise and fall of the voice—how it changes pitch—helps listeners to interpret the context, such as distinguishing between a statement and a question or expressing excitement or sadness. Intonation can create rhythm in speech and enhance the overall expressiveness of the dialogue.

Pacing relates to the speed of speech delivery but does not encompass pitch changes. Volume control is about how loud or soft the voice is but, again, does not involve variation in pitch. Articulation refers to the clarity with which speech sounds are produced, focusing on pronunciation rather than pitch variations. Thus, intonation is the most fitting choice to describe the rise and fall of the voice in speaking.