Hey there!
Let's start out with one thing at a time.
The word
modifier means when a adjective or even a noun make's it impossible to add a sense or even a head of subject.
So, in the sentence above, this would be known as a (misplaced) and not a dangling modifier because it is clear that the sentence used the phrase
"three fire flying" which in this case would be known as a modifier.
Your correct answer would be
. . . .

Hope this helps.
~Jurgen