Which innovative retail product launch by the World Wildlife Fund revolutionized conservation fundraising in 2021?

Conservation efforts for animals and wildlife often rely on innovative retail strategies to raise funds and awareness. Many conservation organizations have pioneered unique product launches that blend commercial success with environmental impact. Test your knowledge about a groundbreaking retail strategy that changed wildlife conservation fundraising!

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NFT Collection 'Non-Fungible Animals' featuring endangered species that disappeared from the blockchain when real-world populations increased
Subscription box 'WildTracks' containing footprint replicas of endangered animals with augmented reality features
Limited edition 'Extinction Countdown' watches that displayed real-time population data of critically endangered species
Biodegradable 'Forest Floor' sneakers with soles that dispersed native plant seeds while hiking in conservation areas