Which innovative product design approach did the World Wildlife Fund (WWF) first introduce in 2008 that revolutionized conservation merchandise?

Conservation organizations often rely on innovative product design and memorable branding to raise awareness and funds for endangered species. One particular wildlife product campaign revolutionized how conservation merchandise connects consumers to animal protection efforts. Test your knowledge about this groundbreaking marketing approach that changed how we think about wildlife conservation products!

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The 'Adoption Certificate' program where customers receive a stuffed animal and certificate for symbolically adopting an endangered species
The 'Origami Wildlife Collection' featuring endangered animals as paper sculptures on product packaging
The 'Last Merchandise' line featuring products with disappearing images of endangered species
The 'WWF Logo Redesign Campaign' where the iconic panda logo was reimagined using only the negative space in black squares