Answer: Elasticity

## Explanation **Elasticity** is the correct answer because it refers to the ability to automatically scale computing resources up or down based on demand. This concept allows companies to: - **Acquire resources when needed** - Scale up during peak usage periods - **Release resources when no longer needed** - Scale down during low usage periods - **Pay only for what you use** - Cost optimization through dynamic resource allocation **Key differences from other options:** - **Availability** - Focuses on ensuring systems are operational and accessible when needed - **Reliability** - Refers to the ability of a system to recover from failures and continue functioning - **Durability** - Concerns the long-term preservation and protection of data Elasticity is a core cloud computing principle that enables cost-effective resource management by matching capacity to actual demand.

Author: Ritesh Yadav