Identify and analyze form. The form of the first two sections can be written as A-B: the "Alleluia" section followed by the verse. After the soloist finishes the verse, the choir returns by singing the opening "Alleluia" section.

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Artists usually use musical imagery to make their compositions more unique and alive. imagery in music used to "show" music. because of that listeners feel what happens. they see music like complete composition. they hear sounds, they feel movement, they see a picture. it makes music deep. that's why  musical imagery is very important and is used by artists so frequently.