Assuming that you're referring to the poem of the city of the yes and the city of the no,
The poem uses an antithesis of Yes and No to represent openness and complete solitude
hope this helps
You should use a correlative conjunction here.
Both . . . and
Either . . . or
Neither . . . nor
Not only . . . but also
Answer: If people knew what was happening in the other parts of Panem then they might turn against the capital knowing the horrible living conditions in which say Katniss’s lives in. What people don’t know doesn’t hurt them. So it benefits the Capital by the amount of control they have.