Which AWS service helps you manage access to multiple AWS accounts?

The choice of AWS Organizations is correct because it is specifically designed to help users manage multiple AWS accounts in a centralized manner. With AWS Organizations, you can create and manage groups of AWS accounts, apply policies to those groups, and automate account creation. This service allows for consolidated billing and enables organizations to define policies that dictate what services and resources can be used across their linked accounts.

AWS Organizations enhances security and governance by providing a mechanism to create organizational units (OUs) and apply Service Control Policies (SCPs) to enforce compliance across accounts. This structure is particularly useful for businesses that require separation of environments (like development and production) or need to manage permissions and billing for different departments or projects effectively.

While AWS Identity and Access Management (IAM) is a powerful tool for managing access to AWS resources, it operates at the individual account level, rather than across multiple accounts. AWS Single Sign-On (SSO) simplifies the management of user access across multiple accounts, but it does not manage the accounts themselves. AWS Control Tower helps to set up and govern a multi-account AWS environment based on best practices, but it relies on AWS Organizations to create and manage the accounts. Therefore, the effective management of multiple AWS accounts through a unified interface is the primary