Answer: Amazon CloudWatch

Amazon CloudWatch is AWS's monitoring service designed specifically for collecting and tracking metrics from AWS resources like RDS and EC2 instances. **Key capabilities of Amazon CloudWatch:** - Collects and tracks metrics from AWS services - Monitors log files from applications and services - Sets alarms to notify when metrics reach certain thresholds - Automatically reacts to changes in AWS resources - Provides a centralized view of resource performance **Why other options are incorrect:** - **A. Amazon CloudFront**: This is a content delivery network (CDN) service, not a monitoring service - **B. Amazon CloudSearch**: This is a managed search service, not designed for metrics collection - **D. Amazon Config**: This service tracks configuration changes and compliance, not performance metrics CloudWatch is the primary AWS service for monitoring resource performance and collecting operational data.

Author: Ritesh Yadav