The feature that is unique to Veeam Agent for Linux and not available in other Veeam Agent configurations is C: Backup from native snapshots. Veeam Agent for Linux includes the ability to leverage native snapshot capabilities of the Linux kernel, such as LVM (Logical Volume Manager) snapshots or Btrfs subvolume snapshots, to create consistent point-in-time copies of data. This capability allows for application-consistent backups even in complex Linux environments, ensuring that data is captured in a consistent state without the need for custom scripting or downtime. Native snapshot support in Veeam Agent for Linux enhances the flexibility and reliability of backups, particularly in environments where Linux-based applications and databases are critical to business operations.