Answer:
d. Intonation
Explanation:
In linguistics, intonation means how the voice rises and falls in speech; it is about variation in the pitch level of the spoken words, which sets the tune of a sentence or a group of words. The three types of intonation -- falling, rising and rising-falling -- determines functions like suggesting the emotions and attitudes and emotions of the speaker. The variation in spoken pitch serves grammatical function in making the difference between kinds of sentence whether it is a statement or a question or an exclamatory.
