Which wildlife conservation organization first used the iconic slogan 'For a living planet' in their global advertising campaigns?

Test your knowledge about famous advertising slogans that have made a significant impact in wildlife conservation campaigns. These powerful taglines have helped raise awareness, funds, and support for endangered species and habitat preservation efforts worldwide. Can you identify which organization created the groundbreaking slogan that revolutionized how we connect with wildlife protection?

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World Wildlife Fund (WWF)
The Nature Conservancy
Wildlife Conservation Society
International Union for Conservation of Nature (IUCN)