Perceive
To perceive is the ability to experience art-- to be able to sense the visual expression presented in the work. This is the key goal of artists and the purpose of the art. Artists use their imagination and skill to convey feelings, creativity and innovation, and to teach people. The beholder of the art should be able to "perceive" to communicate with the artist through the masterpiece.
It's pronounced "ensemble" by the way. And, one way that a pianist would have a role would be by being in the background as an example and playing his part. He's going to play what he needs to play. The question does seem a little to vague, but truly, I would say simply, that the person who is playing it, just plays his part as they all make music sound good.
Any answer choices? If so, go along with this:
Bruegel's artwork include portraits religious scenes, landscape, and gener showing peasant life.
Hope this helps!