Compulsory Writing - Zoos: entertaining vs oppressive

Everyone usually likes zoos but, in my opinion, they should be banned. From my point of view, animals are not meant to be kept into a cage. Since, the human being has the right to be free animals ought to have it as well. Animals are not different from us as we like to think. We tend to consider that being able to talk or think in a independent way not linked to instincts give us the opportunity to run the world. But we are not alone. This ability should make us able to be sympathetic with the rest of beings we share this world with. According to a research, most of the animals that are in zoos suffers from  depression and psycological problems because they are trained for years to give a show. When they are enclosured in cages they cannot follow their instincts and that makes them have behaviour problems. For example, some years ago I went to a zoo and in the Artic section I saw a white whale that was kept into a very little acuarium. Why this white whale has to be caged whe she could be swimming in the ocean? Some people think that zoos are good for kids because it is a great way for them to learn a bit more about animals. But, if that is the only aim of zoos, why not watch documentaries on television where a voice explain everything you want to know about every species. Furthermore, watching documentaries is free. You do not have to pay for a ticket and it is much more comfortable as you do not have to move from your house or even your city to see animals. On one hand, I think it is fantastic that there are some zoos that help species in danger of extintion, but in the other hand, it is the human being who makes these species being in danger. We hunt them and we destroy their enviroments so it is a never ending circle of kill them and then help them. Finally, I consider zoos should dissapear as they represent an oppression because since we do not like to be caged, animals do not like it either.