Which of the following natural world-inspired product innovations was specifically developed after studying the self-cleaning properties of lotus leaves?

The natural world has increasingly influenced product development across industries, from architecture to consumer goods. Companies are incorporating elements from nature not just for aesthetics, but for functional improvements and sustainability. This approach, known as biomimicry or biophilic design, has revolutionized how products are conceptualized and created. Test your knowledge about this fascinating intersection of nature and product innovation!

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Velcro (inspired by burrs that stick to animal fur)
Self-cleaning exterior paints and glass coatings (with superhydrophobic surfaces)
Bullet train nose design (inspired by kingfisher beaks)
Swimsuits with sharkskin-inspired textures for reduced drag