Question

what do actors read out loud to express the words and emotions of characters in a play? scene descriptions prologue dialogue stage directions

Explanation:

In a play, actors read dialogues aloud to express the words and emotions of characters. Scene descriptions, prologue, and stage directions are not read out loud by actors. Scene descriptions set the visual context, the prologue introduces the play (but not spoken by actors during the main performance in most cases), and stage directions guide the actors' movements and actions (not spoken). Only dialogue contains the words and emotional expressions that actors vocalize.

Answer:

Dialogue.