What are you talking about they are this is a stupid question just like you
It depends on which word is underlined.
If the underlined word is <em>boat, </em>then it is used as A. predicate nominative in this sentence.
A predicate nominative is a noun following a copulative/linking verb.
The linking verb in this sentence is <em>is, </em>and the noun following it is <em>boat. </em>
Disappearance of Greek literature, renaissance interest in Greek literature, oral tradition Greek tragedy, transcription of works in the oral tradition. I don't think this is right but it goes something like that <span />