Which concept explains how cloud computing reduces the amount of IT management an organization must perform?

The Shared Responsibility Model clearly delineates the security and management tasks handled by the cloud provider versus those handled by the customer. By outlining what the cloud provider is responsible for (e.g., physical security, underlying infrastructure), it directly shows how an organization's IT management burden is reduced. Self-service provisioning and on-demand resources are benefits of cloud computing, but they describe how resources are acquired, not the division of management tasks. Infrastructure as a Service (IaaS) is a cloud service model, which inherently uses the shared responsibility model, but it's not the concept that explains the reduction in IT management itself.