Final answer:
Stage directions in the script provide crucial insight into character relationships and behavior, and establish the atmosphere of the scene, enhancing the audience's understanding and visualization.
Step-by-step explanation:
The stage directions add vital context and depth to the scene, illustrating the dynamics between the characters, their actions, and their environment. These directions contribute to the atmosphere of secrecy, urgency, and tension. For instance, when Arthur hears the footsteps and expresses annoyance, the audience understands that there is a strained relationship between him and the nanny. Furthermore, when the nanny bangs on the door and demands entry, it indicates her authoritative position and Arthur's reluctance to engage with her. The action of Arthur quickly hiding the treasure chest shows his desire to keep whatever is inside a secret. The specifics, such as the dim lighting or the sounds of footsteps and banging, are instrumental in setting the mood and helping the audience visualize the scene.