Event management, problem management, access management and request fulfillment are part of which stage of the service lifecycle?

Service Strategy focuses on defining the market, developing service offerings, and aligning IT strategy with business strategy - not on managing operational processes.

Service Transition covers the building, testing, and deployment of new or changed services into the production environment, not ongoing operational process execution.

Service Operation is the ITIL lifecycle stage responsible for coordinating and carrying out the activities and processes required to deliver and manage services at agreed levels for business users and customers. All four processes listed - event management, problem management, access management, and request fulfillment - are explicitly defined within Service Operation because they address day-to-day running and support of live services.

Continual Service Improvement is concerned with identifying and implementing incremental and large-scale improvements to services and processes, not with executing day-to-day operational functions.