Answer: Diverting traffic across multiple regions, Diverting traffic to instances with higher capacity

## Explanation **Elasticity** refers to the ability of a system to automatically scale computing resources up or down based on demand. This is a core cloud computing concept that allows applications to handle varying workloads efficiently. ### Why C and D are FALSE: - **C. Diverting traffic across multiple regions**: This is not elasticity - this describes **Global Load Balancing** or **Geographic Distribution**, which is about routing traffic to different geographic locations for performance, redundancy, or compliance reasons, not scaling based on demand. - **D. Diverting traffic to instances with higher capacity**: This describes **Load Balancing** algorithms (like least connections, round robin, etc.), not elasticity. Elasticity is about adding/removing capacity, not just routing to existing capacity. ### Why A and B are TRUE: - **A. Diverting traffic to instances based on the demand**: This aligns with elasticity as it involves routing traffic to handle demand fluctuations. - **B. Diverting traffic to instances with the least load**: This is a load balancing strategy that works with elasticity to distribute traffic efficiently across available resources. **Key Point**: Elasticity specifically refers to the **automatic provisioning and deprovisioning** of resources (like adding/removing EC2 instances via Auto Scaling) to match demand, not just traffic routing strategies.

Author: Ritesh Yadav