Which component is not part of a complete sentence?

A complete sentence must include a subject, a predicate, and convey a complete thought, which together establish a coherent idea. The subject refers to what or whom the sentence is about, while the predicate provides information about the subject, typically including the verb. A complete thought means that the sentence can stand alone without leaving the reader hanging or requiring additional information for full understanding.

In contrast, a conjunction is a word used to connect clauses, sentences, or words within the same clause. While conjunctions play an essential role in sentence construction, they are not necessary components in the definition of a complete sentence itself. Therefore, a conjunction does not need to be present for a sentence to be complete; thus, it is correct to identify it as the component that is not part of a complete sentence.