Answer: AWS Compute Optimizer

AWS Compute Optimizer is the correct service that provides recommendations to help users reduce the cost of Amazon EC2 instances. **Key details about AWS Compute Optimizer:** - Analyzes the configuration and resource utilization of EC2 instances - Provides recommendations for right-sizing instances to match workload requirements - Suggests optimal instance types that can reduce costs while maintaining performance - Helps identify underutilized instances that could be downsized - Recommends when to use different instance families or generations for better price-performance **Why the other options are incorrect:** - **AWS AppConfig**: Used for application configuration management, not cost optimization - **AWS Control Tower**: Used for multi-account governance and management, not specific cost recommendations - **AWS AppSync**: A GraphQL service for building APIs, unrelated to cost optimization AWS Compute Optimizer specifically focuses on analyzing compute resources and providing cost-saving recommendations for EC2 instances and other AWS compute services.

Author: Ritesh Yadav