Answer: Rightsizing

AWS Cost Explorer is a tool that helps analyze AWS costs and usage over time. It enables **rightsizing** by identifying underutilized resources and recommending appropriate instance types to optimize costs while maintaining performance. Rightsizing is the process of matching instance types and sizes to workload performance and capacity requirements at the lowest possible cost. - **Reliability** refers to a system's ability to recover from failures and continue functioning - **Resilience** is about a system's ability to withstand and recover from disruptions - **Modernization** involves updating legacy systems to use cloud-native technologies Cost Explorer specifically supports rightsizing through its cost optimization recommendations and resource utilization analysis.

Author: Ritesh Yadav