Choose correct antonym Earnest

"Earnest" means serious and its antonym "frivolous" means not serious making option B correct. Other options are unrelated. Antonym knowledge enhances vocabulary useful in writing or speaking. Contrasting ideas clarify descriptions especially in narratives or critiques. This skill is vital for professional communication. Accurate antonyms convey contrasting qualities effectively particularly in stories or reviews where precise language enhances the portrayal of attitudes or behaviors clearly and effectively in various contexts.