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.
Answer:
Resource conservation is management of the use of natural resources to provide the maximum benefit to current generation while maintaining capacity to meet the needs of future generations. Conservation includes both the protection and rational use of natural resources.
Explanation:
is this okay with you? :)
