Which of these natural world inspirations led to the development of self-cleaning exterior paint technology now used on buildings worldwide?

The natural world has inspired some of the most groundbreaking product innovations throughout history. From velcro (inspired by burrs) to swimsuits modeled after shark skin, biomimicry has revolutionized how we approach product design. This poll tests your knowledge about famous products that were directly inspired by nature's ingenious solutions. Can you identify which natural adaptation led to which revolutionary product design?

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Lotus leaf's water-repellent surface texture
Spider web's tension structure
Firefly's bioluminescence mechanism
Toucan's thermoregulating beak design