Answer:
Inclusion of stage direction
Step-by-step explanation:
Development of characters, development of theme and plot and inclusion of a setting are all parts of play as well as short story but stage directions is required and included only in plays (more specifically for plays written to be performed).
Stage directions are the directions from playwright for stage crew and stage actors. These instructions are usually written in brackets but they are not read. Stage directions for stage crew may be included at the start of the written play or in some cases in a separate document for actors and stage crew.