Answer:
The interaction between Laurie and Blanche.
Explanation:
Laurie and Blanche are having a conversation with one another. Eugene is only interacting with himself and there is no form of dialogue being spoken. Instead, there are stage directions listed for his character.
I have not read this but I can help. Look for quotations (") and a speaker (example: "The fox jumped over the napping dog" John Smith stated)
