Which of the following is the BEST definition of the term service management?

This is the verbatim ITIL definition of service management, emphasizing that it is a collection of specialized capabilities - processes, functions, and roles - whose specific purpose is value delivery to customers through services, distinguishing it from generic management disciplines.

This describes a 'system' - a set of interacting or interrelated components forming a unified whole - which is the ITIL definition of a system, not service management.

This describes general functional management within an organization, lacking the specificity around specialized capabilities and value delivery that characterizes service management.

This describes an organizational unit or team with assigned roles, which corresponds to the definition of a function in ITIL, not service management itself.