Answer: Inseparability
Explanation: Inseparability is the feature of a service that makes separation of the supply of goods or service and consumption of that service impossible. Inseparability associates the production and consumption activity .
The example mentioned in the question also displays the inseparability characteristic because as the laundry has been done , the call to pick the cloths is the must step and thus repeated calls are received by Keith.The completion of cloth laundry and informing the customer is the inseparable step in the service.