Which AWS service should the administrator use to check how current IAM policy usage compares to current service limits?

Explanations:

AWS Trusted Advisor provides insights on best practices, including checking service limits and IAM policy usage. It shows the current usage against limits for IAM policies.

Amazon Inspector is primarily used for security assessments and finding vulnerabilities, not for checking IAM policy usage or service limits.

AWS Config monitors resource configurations for compliance and auditing, but it does not provide information on IAM policy limits or usage against these limits.

AWS Organizations is used for managing multiple AWS accounts in an organization, not for monitoring service limits or IAM policy usage within a single account.