Concept:A good novel or play does two things: it entertains the reader and gives a lesson.Explanation:The blank should be a word that pairs with "entertain" to describe the purpose of a good novel or play."Teaches" is the most suitable because novels and plays often entertain while teaching moral or social lessons."Preaches" sounds too forceful, and "condemns" or "warns" are too negative for a general statement.Answer:teaches