Modern fax machines use "computers" to transmit text, since computers use the Internet, which remains the fasted and simplest way to transmit information in the modern world.
The Hunger Games were made to bring entertainment to the Capitol. It is also to tell people that the Capitol has great power and to scare all the Districts. Reading the book, it proves that the Capitol are heartless people who enjoy the suffering of others.
The blue whale is by far larger than the megalodon shark.