Amazon DynamoDB is AWS's fully managed NoSQL database service that provides fast and predictable performance with seamless scalability. It automatically handles database administration tasks such as hardware provisioning, setup and configuration, replication, software patching, and cluster scaling.

Why other options are incorrect:

• Amazon RDS: A managed relational database service that supports multiple database engines (MySQL, PostgreSQL, Oracle, etc.) but is not NoSQL
• Amazon Redshift: A fully managed data warehouse service for analytics, not a NoSQL database
• Amazon Aurora: A MySQL and PostgreSQL-compatible relational database service, not NoSQL