Which celebrity launched the most successful wildlife conservation product endorsement campaign that has directly contributed to saving an endangered species from extinction?

The natural world has benefited enormously from celebrity endorsements and partnerships with conservation organizations. Many famous figures have lent their names, voices, and resources to protect endangered species and habitats. This trivia question tests your knowledge about which celebrity has made the most significant impact through their long-standing commitment to a specific wildlife conservation cause.

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Leonardo DiCaprio with his 'Virunga' campaign that saved mountain gorillas in Congo
Jane Goodall's 'Good For All' coffee brand that preserves chimpanzee habitats in Tanzania
Jackie Chan's 'No Extinction' campaign that reduced rhinoceros horn trafficking by 50%
Harrison Ford's 'Conservation International' partnership that protected over 40 million hectares of tropical forest