Which wildlife conservation organization pioneered the 'adopt an animal' symbolic adoption product model that has since been widely replicated across the conservation industry?

Conservation organizations are increasingly using innovative product strategies to fund their wildlife protection efforts. These product innovations not only raise money but also increase awareness about endangered species and habitats. Test your knowledge about how major wildlife conservation brands have innovated in the product space to support their missions.

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World Wildlife Fund (WWF)
The Nature Conservancy
National Audubon Society
Wildlife Conservation Society