One of the reasons is habitat destruction. Another reason is that people poach. Because they make Chinese medicine of tigers' bones in 1990s. They said, a tiger is killed by poachers in a day in India. Tigers are most important animals at ecosystem, so if we protect tigers, we can protect wild animals and natural environment.
Japan is the country that has a lot of wild animal consumption.
We should protect wild animals, because wild animals cannot appeal. Now if we don't help them, they'll disappear eternally. They have the right to live. Tigers are keys of the ecosystem. Tigers are keys of ecosystem.