a short part of my writing , aw gramma ramians my biggest obstacle -_- It is sometimes claimed that zoos should be closed because animals are suffering inhuman treatment in some commercial zoos aimed to entertaining people. For example, animals live in the hostile condition. To maximize the profits, some zoos may cut the staff. As a result, there are no sufficient people to keep living environment clean. Even worse, because of visitors’ adverse behaviors, animals develop some diseases and it is difficult to receive adequate medical cure, accordingly leading to accidental death of some animals. In addition, they may overload animals in a narrow area for saving space. It is harmful for male animals which have strong territoriality. Animals may be sick because of insanitary condition and fighting. Some zoos do not have specialized medical employees for all kinds of animals and it probably cause death of animals. Besides those drawbacks, some zoos buy overseas animals, which are unsuitable to live in other countries, for attracting visitors. Some researches shows that forcing animals to change their way of living may result in a decline in the birth rate.