The term scatting refers to a singer who:
a. changes the form of a song.
b. leaves the stage to get a drink.
c. sings neutral or non-sense syllables.
d. allows the instrumentalists to improvise during a musical break.

The term scatting refers to a singer who sings neutral or non-sense syllables.

Explanation:

Scatting is a form of singing in vocal jazz whereby a singer improvises, invents, or makes up neutral, wordless, or nonsense vocables or syllables by guessing, or using their instinct or imagination, rather than by a careful plan. In scatting, the singer uses their voice as an instrument to create rhythms and melodies, rather than clear and comprehensible words.

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