Which retail innovation was the first to implement the 'buy one, donate one' model specifically for endangered animal species protection?

Test your knowledge about retail innovations that have made significant impacts on wildlife conservation efforts! Many retailers have developed creative approaches to support animal protection and habitat preservation through their business models. This trivia question focuses on a groundbreaking retail concept that revolutionized how consumers can directly support wildlife conservation through their purchases.

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World Wildlife Fund's 'Adopt an Animal' retail program (1973)
The Nature Conservancy's 'Conservation Checkout' retail system (1985)
National Geographic's 'Photo Purchase Protection' program (1990)
Conservation International's 'Wild Commerce' retail platform (1982)