Which AWS service should the company use to meet these requirements?

Explanations:

AWS Organizations allows for the management of multiple AWS accounts, enabling consolidated billing and centralized management of permissions and policies across accounts. It facilitates the creation of organizational units and the application of service control policies to manage access effectively.

AWS Identity and Access Management (IAM) is primarily used for managing access to AWS resources within a single account. While it controls permissions, it does not provide multi-account management or consolidated billing features, which are essential for the company’s requirements.

AWS Billing and Cost Management provides tools for managing billing and costs but does not offer functionality for controlling access to services or managing multiple accounts. It is focused solely on financial management and reporting.

Amazon Cognito is used for managing user authentication and access for applications but does not provide features for consolidating billing or managing access across AWS accounts. It is not suited for the company’s multi-account strategy needs.