Which AWS service provides CPU utilization metrics for a company's Amazon EC2 instances so a systems administrator can monitor them?

Amazon CloudWatch is the correct answer because it is a monitoring and observability service that collects monitoring and operational data in the form of logs, metrics, and events. It provides detailed metrics for AWS resources like Amazon EC2 instances, including CPU utilization, network I/O, and disk activity. Systems administrators use CloudWatch to monitor performance, set alarms, and react to changes in their AWS environment. AWS Config is incorrect because it assesses, audits, and evaluates the configurations of your AWS resources, rather than providing real-time performance metrics. AWS Trusted Advisor is incorrect because it provides recommendations to optimize costs, improve performance, enhance security, and fault tolerance, not real-time operational metrics. AWS CloudTrail is incorrect because it records API calls and related events made in your AWS account, providing an audit trail for governance, compliance, and operational auditing, not performance monitoring.