Final answer:
Relationship rules are essential as they provide guidance on communication interpretation and define expectations within interpersonal interactions, acting as social norms that aid in the maintenance of social organization through shared understanding.
Step-by-step explanation:
Relationships have rules that guide how partners communicate; this is essential for several reasons. Primarily, rules are important because they guide how partners interpret each other's communication and define what is expected in the relationship. These 'rules' are essentially social norms that provide a framework for interactions and help individuals to understand their roles and the behaviours that are appropriate within different contexts, such as in romantic relationships or during social events. Cultural frames, for example, tell people what is expected from them in various situations. It is through these frameworks and expectations that society regulates behavior, establishing a shared understanding that facilitates communication and social organization.