Difference between fad and fuss

[daisy]

Test No. incompl/advan-42 "Consider this", question 4

That style of dress was once considered to be a ......... but now it is coming back into fashion.

(a) fuss
(b) fad
(c) fidget
(d) fun

Test No. incompl/advan-42 "Consider this", answer 4

That style of dress was once considered to be a fad but now it is coming back into fashion.

Correct answer: (b) fad

Your answer was: incorrect
That style of dress was once considered to be a fuss but now it is coming back into fashion.
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why fuss is not fix there?

[Alan]

Fuss means a trouble or difficulty that people make over something unimportant so if someone is complaining and it's not really necessary you say to them: Stop making a fuss.
Fad is a fashion that people follow or adopt for short while and then another fad or fashion takes its place.
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English as a Second Language
You can read my ESL story Phrasal Verbs/run