Which product design innovation by the World Wildlife Fund (WWF) revolutionized wildlife conservation fundraising in the 1970s?

Conservation organizations have continually innovated their product designs to maximize impact and appeal to donors. From traditional merchandise to digital experiences, the evolution of wildlife conservation products reflects changing consumer preferences and technological advancements. This trivia question focuses on a significant product design pivot that transformed how people connect with endangered species protection efforts.

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The symbolic animal adoption program with plush toys and certificates
Wildlife-themed credit cards donating a percentage of purchases
Interactive digital zoo apps showing endangered habitats
Monthly subscription boxes with sustainable wildlife products