The best example of a domain-specific language (DSL) from the given options is "shape."
Domain-specific languages are tailored to specific application domains. "Shape" could refer to a type of language or set of terms used in geometry or graphical design, which makes it more relevant in a specific context compared to the other options.
However, note that the term "shape" is somewhat generic. Domain-specific languages are typically more structured and formalized, but based on your provided options, "shape" is the most appropriate choice.