What term describes the ability of cloud services to adapt resources based on demand?

The correct term that describes the ability of cloud services to adapt resources based on demand is "Rapid Elasticity." This concept refers to the cloud's capability to automatically increase or decrease resources as needed, allowing services to accommodate varying workloads efficiently. This dynamic adjustment ensures that users experience optimal performance without the need for manual intervention, making it an essential feature of cloud computing.

Scalability, although related, refers more generally to the system's capacity to grow or shrink resources but doesn't specifically highlight the speed and automation aspect associated with "rapid elasticity." Resource pooling denotes the cloud provider's ability to serve multiple clients from the same physical infrastructure, while high availability focuses on the system's ability to remain operational and accessible, rather than how it adjusts resources in real-time based on demand. Thus, "Rapid Elasticity" is the term that best captures the unique ability of cloud services to quickly adapt resources in response to changes in demand.