The key can be established by seeing which notes are played on the piano
Answer:
The use of a star's popularity to promote movies.
Explanation:
The <u>star system</u> in Hollywood was called that way because production companies used to hire very famous actors and actresses to star in their productions for a long period of time and they would ensure the popularity of those films because of the actors and actresses that starred them. For example, Greta Garbo was part of the star system.
