What is a characteristic of Alibaba Cloud's Relational Database Service (RDS)?

Alibaba Cloud's Relational Database Service (RDS) is specifically designed to manage relational data. This means it is built to handle structured data organized into tables, where relationships among the data can be defined and queried using SQL (Structured Query Language). The primary function of RDS is to serve applications that require consistent, reliable, and transactional access to structured data, which is a hallmark of relational database management systems (RDBMS).

The other choices present characteristics that do not align with the core functionality of RDS. Unstructured data management, for example, pertains to databases designed for documents, lists, or multimedia, which is outside the scope of RDS. Focusing only on single-user access runs contrary to the capabilities of RDS, which supports multiple concurrent users accessing data simultaneously. Furthermore, the notion of being limited to local servers is inaccurate; RDS operates on Alibaba Cloud's infrastructure, allowing users to access and manage their databases remotely in a scalable cloud environment.

In summary, the answer accurately reflects the fundamental purpose of Alibaba Cloud's Relational Database Service in managing and querying structured relational data efficiently.