In the one-act play "Trifles" by Susan Glaspell, stage directions are particularly important in establishing the tone and mood of the narrative. Consider the following excerpt from the stage directions: 'The kitchen is in the same old-fashioned farmhouse style, but it is disheveled and neglected. There are signs of former comfort, yet the atmosphere is dark and heavy.' How do these stage directions primarily contribute to the play's themes and character development?