They are the children of an idle brain.
~
So they are the creation of fantasy when you are bored
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:
See explanation for answer.
Explanation:
I believe the answer to your question is choice number one. I'm not sure if this is correct but I hope it helps!
Have a lovely day!