What is the primary function of intonation in speech?

The primary function of intonation in speech is to convey emotional meaning or emphasis. Intonation involves the variation in pitch while speaking, which can signal different emotional states, attitudes, or the speaker's intent. For example, a rising intonation at the end of a sentence can indicate a question or uncertainty, while a falling intonation can suggest finality or certainty. This variation plays a crucial role in how messages are interpreted by listeners, as it adds nuance beyond the literal words spoken. Intonation helps to emphasize certain words or phrases, thereby influencing the overall meaning of the utterance and aiding in effective communication.