What is the basic unit of spoken language that can contain one or more tone units and must have a nucleus with pitch movement?

• A. Tone Unit
• B. Syllable
• C. Morpheme
• D. Phoneme

Answer: (A)

In intonation analysis, a tone unit (also called an intonational phrase) is the basic chunk of spoken language that carries a single, coherent pitch pattern. Each tone unit has a nucleus—the most prominent syllable in the unit—on which the main pitch movement occurs. This nucleus anchors the upward or downward pitch contour that defines the tone of the unit, and the unit can comprise one or more syllables as it stretches across speech. Boundary cues like pauses or boundary tones often mark the ends of tone units, separating one tonal pattern from the next in an utterance.

This makes the tone unit the best fit for the description because it explicitly centers on a single pitch movement anchored by a nucleus, and it can contain multiple syllables, which aligns with how prosodic patterns are organized across stretches of spoken language. In contrast, a syllable is a smaller unit defined by its nucleus, not by a complete pitch contour; morphemes and phonemes are other linguistic units with no inherent prosodic contour.