The form that consists of a refrain alternating with contrasting material is the rondo. This form features a recurring theme interspersed with different contrasting sections. Other forms like sonata-allegro and ternary do not exhibit this refrain structure. ;
The form that consists of a refrain alternating with contrasting material is the rondo. A rondo typically follows a structure of A-B-A-C-A, where A is the refrain and B and C are contrasting themes. This format provides both cohesion and variety in music.
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