This isn't neccessarily true. Your introduction can still make sense without the hook, and the information inside the introduction part should really not directly depend on the hook to explain them, they should either be self explanatory, or you should explain them there.
Hopefully this helps!
The reason a writer has to write something
Hemisphere ~ sphere
Graceful ~ grace
Unfriendly ~ friend
I think men and women can work equally as hard…this question is circumstantial and s t u p i d
