Final answer:
The application of systems theory to families has focused primarily on how families establish boundaries and rules. This helps to understand how families maintain structure and organization. Therefore given statement is A
Step-by-step explanation:
The application of systems theory to families has focused primarily on how families establish boundaries and rules. This is because systems theory in sociology examines how families function as a whole and how different parts of the family system interact with each other. By studying how families establish boundaries and rules, sociologists can understand how families maintain structure and organization.
For example, family members may establish boundaries by setting rules about personal space or privacy. They may also establish rules about who is responsible for specific tasks or roles within the family. These boundaries and rules help to create a sense of order and stability within the family.
Overall, studying how families establish boundaries and rules through the application of systems theory provides valuable insights into the dynamics and functioning of families.