A music ensemble is: Select one: A group of music phrases with complete meaning. A group of movements of a larger music composition. A group of musicians that perform as a unit. A group of movements unified by cadences.

A group of musicians that perform as a unit.

Explanation:

I leaned this in music class and I've played ensembles with drums

satin. 

"very shiny satin may look great in the fabric store or in the sewing room, but once onstage it can look fake and cheap as it reflects the light from the fixtures."