1. the person in charge of the overall creative vision or goal of the enesemble

the conductor

Explanation:

A music ensemble is led through a creative vision or goal by the music conductor. Generally there is only one conductor, however if there is more than one then all are led by the principal conductor.

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artists need to create a realistic interpretation so that people in general can relate to the artwork. for a common people, an artist's impression gets increased only if he can create something which would look realistic. an abstract is difficult for a common people to understand whereas if a person can draw a girl with simple pencil sketch and if that looks like a real figure then the latter will be praised more than the former.