The second one is the answer for this question
Yes this sentence is a fragment. It doesn't have a predicate and sentences need to have a subject and a verb (predicate) in order to be complete.
answer: you can believe each individual snowfall is unique
Millie has box which contains 100 cubes
She has a bag which contain 70 cubes
so total cubes she has is 170 cubes
If she is making a train of 10 cubes so,
170 / 10 ( because one train has 10 cubes)
= 17 trains out of 170 cubes.
Ans = 17 trains
:) hope I helped you