Replicating data across different geographic regions to protect against regional disasters. Like keeping backup files in different cities or countries.
Critical business data is replicated from US East to US West regions to survive regional disasters like hurricanes or earthquakes.
All four options replicate object data to a separate geographic region for disaster recovery. AWS S3 CRR and OCI Replication are explicit source-to-destination replication features. Azure GRS/RA-GRS provides built-in asynchronous replication to a paired region (RA-GRS adds read access to the secondary). Google Cloud dual-region stores data redundantly across two regions you choose (replication is managed by the service rather than configured as per-object replication rules).