The reason of animals and plants to extinction. The most common cause is due to human activities. Because human beings have the invasion area. Of living plants and animals. With the widening of living space, building a building built facilities. So destroy the natural habitat. The population in the country more, make the invasion destroyed. Forest land to build houses, housing. Destroying the habitat of animals and plants. To make space in finding food and breeding decreased, changing environment affects the food. The important cause that makes the animal and plant species extinction.