Which term describes the four subsystems of language: grammar, vocabulary, phonology, and discourse?

• A. Systems
• B. Components
• C. Aspects
• D. Domains

Answer: (A)

These four areas—grammar, vocabulary, phonology, and discourse—are best described as a system. Seeing them as a system highlights how they are interrelated parts of a unified structure that makes language work. Grammar gives you the rules for how words are arranged, vocabulary provides the items you use, phonology handles the sound patterns and pronunciation, and discourse organizes language across longer stretches of talk or text. Together they form an integrated network; deficiencies in one area affect the others and, overall, language proficiency hinges on how well these subsystems interact. While you might hear terms like components or domains, they don’t as clearly convey the idea of an interconnected, functioning whole the way system does.