Which AWS service lets customers record and review API calls made in their AWS accounts?

AWS CloudTrail is the correct answer because it records API calls and related events made by users, roles, or AWS services in your AWS account. This allows you to review actions taken, troubleshoot operational issues, and ensure compliance. AWS Trusted Advisor provides recommendations for optimizing costs, security, performance, and fault tolerance, but doesn't record API calls. Amazon Inspector is an automated security assessment service that helps improve the security and compliance of applications deployed on AWS, not an API call recorder. AWS X-Ray helps developers analyze and debug distributed applications, but it focuses on request tracing within applications, not account-level API call logging.