Which Azure feature enables publishing and deploying preconfigured virtual machine images for testing?

Shared Image Gallery (now Azure Compute Gallery) allows you to manage, share, and distribute custom VM images across Azure subscriptions, tenants, and regions. This is ideal for publishing and deploying preconfigured images for testing, development, or production environments, ensuring consistency and version control. Azure Resource Groups are logical containers for Azure resources, not for image management. Azure VM Scale Sets are used for deploying and managing a group of identical, auto-scaling VMs, but they rely on an image source, which could be a Shared Image Gallery. Azure Marketplace offers pre-built images from Microsoft and third-party vendors, but it's for consuming existing images, not for publishing your own custom, preconfigured images for internal testing.