Which AWS service or tool will monitor AWS resources and applications in real time?

Explanations:

AWS Trusted Advisor provides recommendations for best practices in AWS but does not monitor resources in real time.

Amazon CloudWatch is a monitoring service that provides real-time data and insights on AWS resources and applications.

AWS CloudTrail tracks API calls and user activity within AWS services, providing logs rather than real-time monitoring.

AWS Cost Explorer helps analyze and visualize AWS spending over time but does not monitor resources or applications in real time.