Concept:Intonation is the rise and fall of the voice while speaking, which is a change in pitch.
Explanation:Intonation refers to the variation in pitch during speech.
Pitch is how high or low a sound is, and it changes meaning or emotion.
For example, a rising pitch often signals a question.
A falling pitch can show a statement or finality.
Without intonation, speech would be flat and colorless.
Intonation does not mean variation in sound, organ, or air.
It specifically means variation in pitch to convey different meanings.
Answer:B. pitch