In the sentence, "I am a teacher." "teacher" represents which function in the sentence?

1. predicate adjective

2. predicate noun

3. direct object

4. indirect object

Predicate Noun

Explanation:

A predicate noun, or predicate nominative, is a noun or noun phrase that provides more information about the subject of the sentence. It completes a linking verb, like "to be." Predicate nouns can only follow linking verbs because they're expressing a state of being, not an action.