Which of the following is NOT a part of speech?

A clause is a group of words that contains a subject and a predicate, and it can function as a part of a sentence. While clauses do play a crucial role in sentence structure, they are not classified as parts of speech.

Parts of speech are categories that describe the function of words in a sentence. Verbs express actions or states of being, nouns represent people, places, or things, and adverbs modify verbs, adjectives, or other adverbs by providing additional information about how, when, where, or to what extent something occurs.

Understanding the distinction between clauses and parts of speech is essential for analyzing sentence structure and grammar effectively.