In family systems theory, the term for a smaller network within the larger family that can influence dynamics is

• A. Subsystem
• B. Symptom Cluster
• C. Family of Origin
• D. Coalition

Answer: (A)

The main idea is that families contain smaller networks that develop their own interaction patterns. These smaller networks are called subsystems. Examples include the marital pair, the parent–child dyad, or a parent with a particular child. Subsystems have boundaries, roles, and routines that shape communication and influence how problems unfold across the whole family. Recognizing a subsystem helps explain why certain dynamics persist and guides where to focus work to improve overall functioning.

This term is the best fit because it names the general unit of a smaller network within the larger family system. A coalition, while describing a specific alliance within a subsystem, is an interaction pattern rather than the unit itself. A family of origin refers to the family someone grew up with, not the internal subdivision of a current family. A symptom cluster is a medical/psychological term for co-occurring symptoms, not a familial structural unit.