Which benefit helps organizations avoid wasting resources on idle infrastructure?

Consumption-based billing, also known as pay-as-you-go, means you only pay for the cloud resources you actually use. This directly addresses the problem of idle infrastructure by ensuring you aren't charged for resources that are provisioned but not actively being utilized. Agility refers to the ability to respond quickly to changes, which is a broader cloud benefit but doesn't specifically prevent waste from idle resources. Disaster recovery is about business continuity after an outage, not cost optimization for idle resources. Vertical scaling involves increasing the capacity of an existing resource, which can be part of efficient resource management but doesn't inherently prevent paying for idle resources if they are over-provisioned.