Zoos should be banned.
Nowadays, lots of people start to realize that zoos are not a good place for animals. People need zoos because it is an easy way to close the animals and also because it's convenient for people to observe them. However, zoos are in fact a cruel place for animals. Animals should live in their natural habitat. An animal's natural instinct is to run and to hunt. But that's not for animals kept in zoos. Everyday, people feed them. They've never been taught how to hunt for food and will gradually lose their natures. That will be quite cruel for a animal, especially for wild animals such as tigers and lions. You can often find in zoos that a tiger kept in cage has a loose expression in its face.We set animals in zoos and therefore feel that they won't meet danger and may be able to protect them from dying out. This may be just a excuse we find for ourselves to make animals in cages just as entertainment. We always say animals are our friends, then why we put our friends in cages?