Answer:
sentence
Step-by-step explanation:
A sentence is not a part of speech; it is a grammatical unit that consists of a group of words expressing a complete thought. The other options listed are all examples of different parts of speech:
- Adjective — a word that describes or modifies a noun or pronoun
- Noun — a word that represents a person, place, thing, or idea
- Preposition — a word that shows a spatial or temporal relationship between a noun and other words in a sentence