What Azure structure enables unified governance across multiple subscriptions?

Management Groups provide a level of organization above subscriptions, allowing you to apply policies, access control, and compliance across multiple subscriptions simultaneously. This unified approach simplifies governance for large-scale Azure deployments. Azure Regions are geographical areas for deploying resources, not for governance. Azure Availability Sets are used for ensuring VM uptime within a region, not for overarching governance. Resource Tags are key-value pairs for organizing and categorizing resources within a subscription, but they don't provide a hierarchical governance structure across subscriptions like Management Groups do.