Which service performs block level replication of your Azure virtual machine?

The correct choice is Azure Site Recovery, which is designed specifically for disaster recovery and can facilitate block-level replication of Azure virtual machines. This service continuously replicates virtual machine data to a secondary location, enabling organizations to ensure business continuity in the event of an outage. By operating at the block level, Azure Site Recovery minimizes the data transfer volume, allowing for efficient and timely replication of changes made to the virtual machines.

While Azure Backup focuses on creating point-in-time backups and can restore data, it does not specifically focus on the continuous replication of virtual machines at the block level like Azure Site Recovery does. Azure Files provides a managed file share service in the cloud, and Azure Blob Storage is used for storing unstructured data like text and binary data, but neither of these services offer the specific functionality of block-level replication for virtual machines.