Answer:
Inseparable
Step-by-step explanation:
A customer having a aircut has to be present physically and also participate in the service because the customer can't separate himself from the haircut. It isn't possible to separate the head from the owner of the head.
Service is inseparable if the service requires the presence of the service provider and the service receiver.
Service inseparability means that the production and consumption of a service can't be separated from the provider and receiver of that service. It also requires that both the service provider and the service receiver must be present physically in order to achieve the purpose of the service.