I am not sure if there is a difference between using "the" or not in these sentences below:
*Situation 1: At a talk show, I start my speech :
(1) Hi everybody, today, I am going to talk about (the) benefits of reading books.
*Situation 2: I ask one of my friends:
(2) Jim, do you know (the) benefits of reading books? I think you should read more books.
*Situation 3: I make a general statement:
(3) (The) benefits of reading books are obvious. A lot of people nowadays spend more time on reading books.
*Situation 4: I ask my friend:
(4) Hey, What is (the) benefits of reading? Why should I read more?
*Situation 5: I start an paragraph:
Here are (the) benefits of reading:
a.Reading Increases General Knowledge.
b.Reading Reduces Stress.
Im not sure if "the" is optional in my sentences, and what is the difference between them. My instinct says that I should use "the" in situations above.But I just don't know why.