2) What is the 9'? What is it like that we have in our world today? in the book f451

This book talks about the issue of monopolizing the media and burning of books.

Explanation:

The book Fahrenheit 451 talks about the issue and the problem of burning the book because at that time of the past, the books were banned.

The deeper meaning of the book was to control the media and monopolizing the media which will have an adverse affect on the society and the generations which are to come in future where no one would be connected to each other and there would be a lot of dependence on technology.