Which is NOT one of the principle devices involved in grammar?

Question

Quizplus · Accepted Answer

Phonetics is the study of the sounds of human speech, not a principle device involved in grammar. Syntax, inflection, and intonation are all aspects of grammar. Syntax refers to the arrangement of words and phrases to create well-formed sentences, inflection involves the modification of words to express different grammatical categories such as tense, mood, voice, aspect, person, number, gender, and case, and intonation refers to the variation of pitch while speaking, which can change the meaning of words and sentences.

Which Is NOT One of the Principle Devices Involved in Grammar