The definition extinction according to Wikipedia is all the natural animals that live in a particular area are losing

The definition extinction according to Wikipedia is all the natural animals that live in a particular area are losing, perishing and dead because of development nowadays , animals are often being the victims of greedy humans. As a result, we are now threatened with the extinction of hundreds of animal species. Impossible in the future, elephants, tigers and lions are only recognizable by next generation through animal museum. What are the causes and the extent of human responsibility to solve this problem? There are many causes of animals extinct such as temperature increase, poaching and hunting, habitat fragmentation and increased human population.