The correct answer is E. extinct, enjoy.
Endangered wild animal species are at risk of becoming extinct, which means that they will no longer exist on Earth. This is a serious problem because it means that future generations will not be able to see or experience these amazing creatures. We must take action to prevent endangered species from becoming extinct so that our children and grandchildren can enjoy the great diversity of animal life.
The other options are not as good because they do not accurately reflect the seriousness of the problem. Rare animals are still around, but they are not as common as they used to be. Outdated animals are no longer useful or relevant. Volatile animals are unpredictable and dangerous. Powerful animals are strong and can be dangerous, but they are not necessarily endangered.
It is important to remember that endangered species are not just animals. They are also part of our planet’s natural heritage. We have a responsibility to protect them for future generations.