Concept:Intonation is the variation of pitch in spoken language that helps convey meaning, emotion, or attitude.
Explanation:When we speak, our voice naturally goes up and down in pitch.
This rise and fall of pitch is called intonation.
For example, a rising pitch at the end of a sentence often shows a question, while a falling pitch shows a statement or command.
Intonation also expresses surprise, emphasis, or other feelings.
Without intonation, speech would sound flat and unclear.
Other options: "rhythm" refers to a regular beat pattern in music or speech. "Syllable" is a single sound unit in a word. "Pause" is a brief stop in speaking.
Thus, the correct term for the rise and fall of pitch is intonation.
Answer:C. intonation