Pitch refers to the perceived frequency of a sound, determining how high or low it sounds. In language, pitch is crucial for intonation, which affects meaning, emotion, and emphasis. For example, in English, a rising pitch at the end of a sentence typically indicates a question. Teaching pitch involves helping learners recognize and produce variations in pitch to convey different meanings and emotions. Activities might include listening exercises, mimicking native speakers, and practicing intonation patterns in sentences and dialogues.