Obviously television has both advantages and disadvantages. In the first place, television is not only a convenient source of entertainment, but also a cheap one. With a TV set in the family people don't have to pay for expensive seats at the theatre, or the cinema. Some people, however, think that this is where the danger comes from. The television viewers need do nothing. He makes no choice and exercises, no judgment. He is completely passive. Television keeps one informed about what is happening. The most distant countries and the strangest customs are brought right into one's sitting room. On television everything is much more living, much more real. Yet here again there is a danger. We get so used to looking at the movements on it, so dependent on its pictures that it begins to control our lives. People often say that their television sets have broken down and that they have suddenly found that they have far more time to do whatever they are interested. It makes us think, doesn't it? There are many other arguments for and against television. We must realize that television itself is neither good nor bad. It is the uses that determine its value to society. What is the major function of paragraph 1?