Amazon RDS (Relational Database Service) is the service that best fits the requirements since it is a managed service that automates hardware provisioning, database setup, patching, and backups and supports high availability and read replicas. Amazon DynamoDB does not meet the requirement as it is a NoSQL database service. An Amazon EC2 hosted database would require manual management of the aspects specified in the question. AWS Database Migration Service is a service that helps you migrate databases to AWS; it is not a database service.