What is one of the key benefits of using Core Data Services in ABAP?

One of the key benefits of using Core Data Services (CDS) in ABAP is that it enforces business logic at the database level. CDS allows for the definition of data models that can include business rules, validation, and constraints directly within the database layer. This encapsulation of logic ensures that business rules are consistently applied, regardless of how the data is accessed, whether through SAP applications or other interfaces.

By implementing business logic at this level, CDS enhances data integrity and promotes a more centralized approach to managing complex business scenarios. It leverages the capabilities of the underlying database, which can lead to performance improvements as some calculations and data processing can occur directly on the database server rather than requiring additional application server resources.

The other options relate to different aspects of application development and data management, but they do not accurately capture the distinctive purpose and advantages of CDS within ABAP and SAP's architecture. For example, while it is true that CDS simplifies the development process by abstracting some complexity, it does not eliminate the need for SQL knowledge entirely, nor does it create web services automatically or facilitate database backups directly.