Answer:
I can't see the picture of the artwork so I can't really answer. Sorry :/
An orchestra is defined as a large instrumental ensemble typical of classical music. An orchestra features bass, brass, strings, woodwinds, and percussions. In the list given above, the section that is not one of the four groups in the orchestral palette is the voices. The answer would be "voices".
that depends on the amount of popsicle sticks
Yes it would be okay. You are only using it for 2 things. Not everything.
