Final answer:
The core ITSM component that is not involved in CSM is Knowledge Management.
Step-by-step explanation:
The core ITSM component that is not involved in CSM (Customer Service Management) is D. Knowledge Management.
CSM primarily focuses on managing and responding to customer incidents, managing and implementing requested changes, and identifying and resolving problems. However, knowledge management, which involves capturing, organizing, and sharing knowledge within an organization, is not directly involved in CSM.