Answer:
A casting director is the person that organizes the casting of actors for all the roles in a play or a film.
Explanation:
The person in this position, facilitates the process of a casting by working closely with the director and producer in order to understand their requirements. The possible benefits of the directos in having a casting director is that this person can suggest ideal artists for each role, although they must not be confused with the manager, who represents the artist directly. The possible drawback of having a casting director can be that, if they (the director and the casting director) don't communicate well, and if the casting directors doesn't comprehend exactly what the director is aiming for, he/she will probably fail in reaching the perfect artist for the role. It always takes risks for the director not being the one that leads the casting.