What are direct objects and subject complements

The simalarities between a direct object and a subject complement are ... one they both follow some type of verb. then they also die in a hole and live there which is kind of cool

Direct Object: a noun phrase denoting a person or thing that is the recipient of the action of a transitive verb / the main thing the sentence is talking about

Subject Complements: adjective, noun, or pronoun that follows the linking verb