Intonation refers to the variation in pitch while speaking, which helps convey meaning and emotion in language. It plays a crucial role in distinguishing between statements, questions, and commands. For example, a rising intonation at the end of a sentence often indicates a question, while a falling intonation typically signals a statement. In addition to grammar, intonation can express feelings such as excitement, surprise, or sarcasm. Different languages, including English, Spanish, and Mandarin, have unique intonation patterns that can affect communication. Understanding intonation is essential for effective verbal interaction and can enhance clarity in conversations.