Which AWS service should the company use for the database?

Explanations:

Amazon Redshift is a data warehouse service optimized for online analytical processing (OLAP). It is not designed for NoSQL data storage or high-velocity transactions typically associated with NoSQL databases.

AWS DataSync is a service for transferring data between on-premises storage and AWS storage services. It does not provide database capabilities, so it is not suitable as a NoSQL database solution.

Amazon Athena is an interactive query service that allows users to analyze data directly in Amazon S3 using standard SQL. While it can work with data in a schema-less format, it is not a NoSQL database but rather a querying service.

Amazon DynamoDB is a fully managed NoSQL database service that provides fast and predictable performance with seamless scalability. It is specifically designed for applications that require low-latency data access and can handle various data types.