Concept:Language is a rule-governed symbolic system used by humans for communication. It consists of multiple interconnected subsystems like sounds, words, and grammar.Explanation:Language is not a scientific system; it is a social and cultural phenomenon. It is not only written; it includes spoken and signed forms. Language is a system of systems because it has layers: phonology (sounds), morphology (word formation), syntax (sentence structure), and semantics (meaning). Each layer works together rulefully. Option A is wrong because language is not purely scientific. Option B is too narrow – language includes oral and gestural forms, not just written. Option D says "structure and forms" but misses the systematic interconnection. Only option C captures the idea that language is a whole made of smaller systems.Answer:C. Language is a system of systems.