Which service is recommended for tracking changes made by AWS services?

AWS CloudTrail is the recommended service for tracking changes made by AWS services. CloudTrail provides a comprehensive logging mechanism that captures all API calls and events related to your AWS accounts. This includes actions taken by users, roles, and AWS services, allowing you to monitor, audit, and maintain a record of changes over time.

When you enable CloudTrail, it records details about each API request made across your AWS resources, including the source of the request, the time it was made, and the resulting actions taken. This capability is crucial for governance, compliance, and operational troubleshooting, as it provides visibility into the usage patterns and changes to the infrastructure.

In contrast, while Amazon CloudWatch is used for monitoring the performance of AWS resources and applications in real-time, it does not focus on change tracking. Amazon Inspector is a security service that helps identify vulnerabilities in your applications, and Amazon Cognito is designed for user authentication and access management. These services cater to different purposes and do not provide the tracking and logging functionality that CloudTrail delivers.