For this case we can translate the sentence given as:
The person who writes a play is called _______.
We have the following options:
-Director
-Playwright
-Actor
-Protagonist
By definition, "playwright" means the person who writes a script or writes dramas. Thus, the correct option is option B.
The person who writes a play is called a playwright.
Answer:
La persona que escribe una obra de teatro se llama dramaturgo