Which sentence uses the correct comparative form of the adjective fancy? a. this dress is very fancy for the dance. b. that costume is fancier than mine. c. the costumes are the fanciest ones i have ever seen. d. i think a lace dress is more fancier than silk.

B. That costume is fancier than mine.

This option is accurate since the comparative form of the word fancy is fancier.

The comparative form of a word is used when comparing two different things. The following sentence contains an example of a comparative word form:
"The sky is bluer today that it was yesterday". In this sentence, the word "bluer" is used since it is comparing two different things- the sky on one particular day versus the sky on another day.