Which of these is a defining feature of realist novels

A defining feature of realist novels is that it has diverse plots and characters

Explanation:

A realist novel is a representation of the reality into a fiction story, where the use of several characters with many complex conflicts and intertwine stories create the feeling of reading the real-life o a person. Quoting Abrams' Glossary of Literary Terms "A type of novel characterized as the fictional attempt to give the effect of realism by representing complex characters with mixed motives who are rooted in a social class, operate in a highly developed social structure, interact with many other characters, and undergo plausible and everyday modes of experience."

scholarship is an sc because, by definition, a subject complement is the adjective, noun or pronoun that follows a linking verb, for example the verb be (in any of its forms).