Which of the following is a key feature of Amazon Aurora?

Amazon Aurora is designed to deliver high performance and low latency, making it an optimal choice for applications requiring rapid data access and processing. It is a fully managed relational database service that provides the compatibility of MySQL and PostgreSQL while being optimized for the cloud environment.

Aurora achieves high performance through features such as distributed, fault-tolerant storage that automatically grows in increments and a unique architecture that enables faster data retrieval and execution of queries. This design allows for low-latency responses, enhancing user experience and application responsiveness.

The other options do not reflect the distinct advantages of Aurora accurately. Manual resource allocation is generally contrary to the serverless and automated nature of cloud databases like Aurora. Extensive on-premises configuration is not applicable since Aurora thrives in a fully managed, cloud environment. Basic relational database functionalities do not capture the advanced features Aurora offers, such as automatic scaling, replication, and higher availability. Hence, the focus on high performance and low latency delivery aligns perfectly with Aurora's core capabilities.