Which AWS services should a company use to read and write data that changes frequently?

Explanations:

Amazon S3 Glacier is designed for long-term storage and archival purposes with infrequent access, not for frequently changing data.

Amazon RDS is a managed relational database service that supports read and write operations on frequently changing data.

AWS Snowball is a data transfer service used for moving large volumes of data physically, not for continuous read/write operations.

Amazon Redshift is a data warehouse optimized for analytical queries on large datasets, not for frequent data changes.

Amazon EFS provides scalable, elastic file storage for workloads requiring frequent data reads and writes.