Step 1: Understanding the relationship.
A diva is a famous female singer, especially in opera. An opera is a type of musical performance. Similarly, a thespian is an actor or actress, and a play is the performance they act in.
Step 2: Analyzing the options.
(A) Producer : Theatre: A producer is important in theatre but doesn't have the same direct performer-role relationship that a diva has with opera.
(B) Director : Drama: A director may direct a drama, but it’s more of a role rather than a direct performer-genre relationship.
(C) Conductor : Bus: A conductor in this context refers to someone who conducts music, not driving a bus, and has a different relationship.
(D) Thespian : Play: Correct — A thespian (actor/actress) performs in a play, just as a diva performs in an opera.
Step 3: Conclusion.
The correct answer is (D) Thespian : Play, as the relationship matches the one between diva and opera.