Answer: Amazon CloudWatch

## Explanation Amazon CloudWatch is the correct AWS service for collecting performance metrics from Amazon RDS instances and Amazon EC2 instances. ### Why Amazon CloudWatch? - **Performance Monitoring**: CloudWatch is specifically designed for monitoring AWS resources and applications - **Metrics Collection**: It automatically collects metrics from EC2 instances (CPU utilization, network traffic, disk activity) and RDS instances (CPU, memory, storage, database connections) - **Real-time Monitoring**: Provides real-time monitoring and alerting capabilities - **Custom Metrics**: Supports custom metrics for application-specific monitoring ### Why not the other options? - **AWS CloudTrail**: Used for auditing API calls and user activity, not performance metrics - **Amazon Inspector**: Security assessment service for vulnerability scanning, not performance monitoring - **AWS Config**: Tracks resource configuration changes and compliance, not performance metrics CloudWatch is the primary AWS service for collecting, analyzing, and responding to system-wide performance metrics across AWS services.

Author: Ritesh Yadav