Which service provides a secure way to manage permissions for AWS resources across an organization?

Service Control Policies (SCPs) are designed to provide a centralized mechanism for managing permissions across multiple AWS accounts within an organization. By using SCPs, organizations can define what actions are allowed or denied for the AWS accounts under their management. This capability is crucial for maintaining security and compliance standards, as it ensures that accounts can only perform actions that align with the organization’s policies.

SCPs operate at the organizational unit (OU) level in AWS Organizations, allowing administrators to apply broad permissions or restrictions that all accounts beneath them must adhere to. This hierarchical approach strengthens the governance model by enabling consistent permissions management.

In contrast, the other options focus on different aspects of permission management or access control. For instance, AWS Identity Management primarily refers to IAM, which is specific to managing individual user permissions but doesn't provide the overarching control that SCPs do across an organization. AWS Resource Access Manager focuses on resource sharing between accounts, and AWS Permissions Manager is not a recognized service. These alternatives do not fulfill the specific requirement of managing permissions across an organization as effectively as SCPs do.