Read this scene from the miracle worker act 2.

(annie insists, and helen gets rid of annie’s hand by jabbing it with the needle. annie gasps and moves to grip helen’s wrist; but kate intervenes with a proffered sweet, and helen drops the card, crams the sweet into her mouth, and scrambles up to search her mother’s hands for more.)

how do these stage directions add meaning to the play?

the stage directions explain the characters’ facial expressions.
the stage directions illustrate the appearance of the room.
the stage directions describe how characters react to helen.
the stage directions reveal annie’s manner of speaking.