Language which describes ideas, people, or things by stated or implied comparison is called

How can behavioral science be applied in improving public health? a.by tracking a disease to determine its sourceb.by creating promotions that improve health habitscboth by tracking a disease to determine its source and by creating promotions that improve health habitsd.neither by tracking a disease to determine its source or by creating promotions that improve health habits

Which best expresses the irony present in this passage?

Why does the narrator come to the house of usher