Well that's nice but do u need any help?
Relationships is the answer I believe
I hope this helps!
What type of book? Can it be any book?
The only one that makes sense is letter C
Explanation:
An answer for this is:
"The world is very very big!
There are so much mysteries!
There is so much fun as dangerous things! More and more things you learn about world and its complexities, more and more things you understand that you don't know about them! But... You will never understand it completely!