In music, form refers to the structure of a musical composition or performance. ... These organizational elements may be broken into smaller units called phrases, which express a musical idea but lack sufficient weight to stand alone.
Answer:
The answer is "both". Its a plural indefinite pronoun.
THE 103 CH. 5 & 6. STUDY. PLAY<span>. ... the </span>French Neoclassical<span> Ideal has firm 5 genre restrictions: ... all plays should be written in 5 </span>acts<span>.</span>