Which AWS service option meets the user’s requirements?

Explanations:

Running MySQL on Amazon ECS requires managing the underlying containers and infrastructure. It does not provide the automated management features like backups, scaling, or patching that a fully managed database service offers.

Running MySQL on Amazon EC2 involves managing the entire server, including hardware provisioning, software installation, patching, backups, and ensuring high availability and resilience, which the user does not want to handle.

Amazon RDS for MySQL is a fully managed relational database service that handles hardware management, scaling, backups, and replication automatically, meeting the user’s requirement for minimal resource management.

Amazon ElastiCache for Redis is primarily a caching service, not a relational database. It is designed to improve the performance of applications by caching data, and it does not meet the user’s need for a relational database solution.