Answer: Rightsizing

## Explanation **Rightsizing** is the process of matching instance types and sizes to your workload performance and capacity requirements at the lowest possible cost. This involves: - **Analyzing current usage patterns** - Understanding CPU, memory, storage, and network utilization - **Identifying over-provisioned resources** - Finding instances that are larger than needed - **Finding under-provisioned resources** - Identifying instances that are too small and causing performance issues - **Selecting optimal instance types** - Choosing the right combination of compute, memory, storage, and networking capabilities **Why the other options are incorrect:** - **Auto Scaling**: Automatically adjusts capacity to maintain steady, predictable performance at the lowest possible cost, but doesn't specifically address finding the right instance types - **Storage tiering**: Involves moving data between different storage classes based on access patterns, not related to EC2 instance selection - **Instance scheduling**: Automatically starts and stops instances based on schedules to save costs, but doesn't involve selecting the right instance types Rightsizing is specifically focused on selecting the most cost-effective EC2 instances that meet performance requirements without over-provisioning.

Author: Ritesh Yadav