The correct option that describes domain-specific language is: language that refers to a specific subject area.
The correct option that describes a domain-specific language is: "language that refers to a specific subject area." Domain-specific language (DSL) is a programming language or specification language that is tailored to a particular domain or subject area. It is designed to express concepts and rules specific to that domain, making it more concise and easier to understand for users with expertise in that domain. To arrive at this answer, you can eliminate the other options because they do not accurately describe a domain-specific language.