Which AWS service provides a straightforward way to govern a multi-account environment?

AWS Control Tower is designed specifically to help organizations set up and govern a secure, multi-account AWS environment. It simplifies account management by providing pre-configured guardrails that help ensure compliance and security practices are adhered to across all accounts.

With AWS Control Tower, users can create new accounts based on best practices, implement policies across those accounts, and gain visibility into compliance status. It provides a dashboard to monitor account activities and ensure that systems operate within defined governance frameworks. This proactive and centralized approach to governance makes AWS Control Tower an ideal solution for managing multiple accounts effectively.

The other services listed serve distinct purposes. AWS Resource Access Manager primarily focuses on resource sharing across accounts but does not govern the accounts themselves. AWS Organizations, while also beneficial for managing multiple accounts, does not offer the same level of pre-configured governance and automated management features that Control Tower provides. AWS Service Catalog enables organizations to create and manage catalogs of IT services but does not directly address governance across a multi-account setup. Thus, for managing and governing a multi-account AWS environment in a streamlined manner, AWS Control Tower is the most suitable choice.