What does 'show business' mean?

[Juiceful1978]

Business Idiom in English, Intermediate level

ESL/EFL Test #53 "Business Expressions (2)", question 10

All the famous film stars, actors, directors and writers were at the festival representing the world of ......... business.

(a) play
(b) drama
(c) show
(d) performance

Business Idiom in English, Intermediate level

ESL/EFL Test #53 "Business Expressions (2)", answer 10

All the famous film stars, actors, directors and writers were at the festival representing the world of show business.

Correct answer: (c) show

Your answer was: incorrect
All the famous film stars, actors, directors and writers were at the festival representing the world of drama business.
_________________________

can i use drama here

[MrPedantic]

Hello Juice,

"Show business" is a set phrase; it usually signifies the film and theatre business.

"The drama business" is seldom used.

Best wishes,

MrP