Final answer:
The SPARQL 1.1 Service Description provides Data Discovery, enabling clients to understand the capabilities and offerings of a SPARQL service.
Step-by-step explanation:
The SPARQL 1.1 Service Description is a feature of the SPARQL protocol that allows clients to discover the capabilities of a SPARQL service.
Specifically, it provides Data Discovery by describing what the service can do, such as the SPARQL language features it supports, the datasets available for querying, and various details about those datasets.
Thus, the correct answer to what the SPARQL 1.1 Service Description provides is c) Data Discovery.