Answer: Amazon RDS (Relational Database Service) is a managed relational database service that supports multiple database engines such as MySQL, PostgreSQL, SQL Server, and Oracle. Users can launch and manage relational databases in the cloud without worrying about infrastructure management tasks like hardware provisioning, patching, or backups. DynamoDB, on the other hand, is a fully managed NoSQL database service provided by AWS. It offers seamless scalability, high availability, and low latency for applications that require single-digit millisecond response times.