Which other example supports the idea that the endangered species act helped some species recover

Answer:
I'm unable to see the last example but I'm pretty sure that is the correct one as the rest don't really prove the Endangered Species Act helped.
Explanation:
Answer:
Certain animals have been taken off the list.
Explanation:
If the ESA protects endangered animals, then the animals that are threatened should be taken off the list, therefore making the 4th option an example to the idea.