Amazon Macie is a fully managed service that uses machine learning and pattern matching to help you detect, classify, and better protect your sensitive data stored in the AWS Cloud1. Macie can automatically discover and scan your Amazon S3 buckets for sensitive data such as personally identifiable information (PII), financial information, healthcare information, intellectual property, and credentials1. Macie also provides you with a dashboard that shows the type, location, and volume of sensitive data in your AWS environment, as well as alerts and findings on potential security issues1.

The other options are not suitable for identifying sensitive data in AWS. Amazon Inspector is a service that helps you find security vulnerabilities and deviations from best practices in your Amazon EC2 instances2. AWS Identity and Access Management (IAM) is a service that helps you manage access to your AWS resources by creating users, groups, roles, and policies3. Amazon CloudWatch is a service that helps youmonitor and troubleshoot your AWS resources and applications by collecting metrics, logs, events, and alarms4.

1: What Is Amazon Macie? - Amazon Macie

2: What Is Amazon Inspector? - Amazon Inspector

3: What Is IAM? - AWS Identity and Access Management

4: What Is Amazon CloudWatch? - Amazon CloudWatch