collapse is good
The inventor invented an invention.
That is a complex problem.
You have a complex sentence. Best is the last word of a complete sentence. When is an adverb. It is followed by the word They. The word They starts a complete sentence. Thus, the word when makes the second sentence subordinate to the first sentence. That makes it complex.
i need a sentence that have the word unborn
I was very complex with my writing.
I can feel your heart without even touching it.
a compound sentence having a word bewilder?
I invented the kite.
Somewhere near the end of the sixth day, God invented chocolate, and He saw that it was good.
All of the answers were good, although some information was considered excess.
it could be something like this: I am extremely thankful, due to my mom, because i have new clothes. Sorry this isn't very good but it is still a complex sentence with thankful!