Which AWS architectural principle lets you provision resources when required and release them when they are no longer needed?

Elasticity is the AWS architectural principle that allows you to automatically provision and de-provision resources based on demand. This means you can scale out when traffic increases and scale in when traffic decreases, paying only for the resources you use. Availability refers to the ability of a system to remain operational and accessible, often through redundancy. Reliability is the ability of a system to perform its intended function correctly and consistently over time. Durability refers to the long-term persistence and integrity of data, ensuring it is not lost or corrupted. While all are important, only elasticity directly addresses the dynamic scaling of resources based on need.