Amazon RDS with Multi-AZ deployments is designed for high availability and failover support for DB instances within AWS. It automatically provisions and maintains a synchronous standby replica in a different Availability Zone. In the event of a planned or unplanned outage of your primary DB instance, RDS performs an automatic failover to the standby, minimizing disruption. Other services mentioned such as Amazon DynamoDB, Amazon Aurora Global Databases, and Amazon S3 do not fit the scenario described. DynamoDB is a NoSQL service and does not provide a relational database. Aurora Global Databases are used for cross-region disaster recovery, not within a single region. Amazon S3 is object storage and does not support relational database features.