The best answer is shadowy. The relationship between the first pair of words, fussy and carefree, is that of antonyms—words that have opposite meanings. Therefore, the second pair of words must also be antonyms. Shadowy is an antonym of bright.
Yesterday's Analogy Quiz
Tomorrow's Analogy Quiz
About Infoplease, Part of Family Education Network
© 2000–2015 Sandbox Networks, Inc., publishing as Infoplease