Which AWS service should a company use to create workforce users and centrally manage their sign-in security and access across all of the company’s AWS accounts and applications?

AWS IAM Identity Center (AWS Single Sign-On) is the correct choice because it allows you to create or connect your workforce users and centrally manage their access to multiple AWS accounts and cloud applications. This simplifies identity management and provides a consistent sign-in experience. AWS Audit Manager helps automate auditing and compliance reporting, not user management. Amazon Cognito focuses on customer (web and mobile app) identity management, not workforce users. AWS Security Hub provides a comprehensive view of your security alerts and security posture across your AWS accounts, but it does not manage user identities or access.