The numbers of animals are dcreasing day by day and most of the species are already in the condition of extinct. In the following essays, I will describe the reasons behind the extinction of animals and ways to solve this issue.The biggest reason for decreasing numbers of animal is natural decaying. Due to over population, nature is being distorted as more living spaces are needed for human beings. For instance, in Bangladesh forestry has been cut off to make rail way through the jungle. As a result, elephants and other species are under danger.