Which AWS service monitors CPU utilization on Amazon EC2 instances?

Explanations:

AWS CloudTrail is primarily used for logging and monitoring API calls within AWS services, not for CPU metrics.

Amazon Inspector is a security assessment service that helps improve the security and compliance of applications, not for monitoring CPU utilization.

AWS Config tracks AWS resource configurations and changes over time, but it does not monitor performance metrics like CPU utilization.

Amazon CloudWatch is a monitoring service that provides metrics and logs for AWS resources, including CPU utilization for EC2 instances.