Which one is not categorized as one of the three types of gangs?

The classification of gangs typically includes street gangs, motorcycle gangs, and prison gangs. Each of these categories is defined by their distinct environments and operational behaviors.

Street gangs are often local, community-based groups that engage in criminal activities and are characterized by their territorial control. Motorcycle gangs are generally organized around motorcycle culture and may also engage in criminal enterprises, often structured more hierarchically. Prison gangs, on the other hand, emerge in correctional institutions and may have strict codes of conduct and membership that revolve around incarceration.

Suburban, while it indicates a geographical area, does not represent a formal category of gangs recognized in the same vein as the others. Gangs can exist in suburban areas, but "suburban" does not adequately define a type of gang; rather, it refers to the location where gangs may operate. Therefore, it is appropriate to note that "suburban" is not categorized as one of the primary types of gangs, making it the correct answer. This distinction helps to clarify the structural and functional differences among gang types in law enforcement practice.