Which innovative wing design feature, first implemented commercially by Airbus in 2013, reduces fuel consumption by approximately 4% by mimicking the efficient flight of birds?

The transportation industry has seen remarkable innovations in aircraft design over the decades, with manufacturers constantly pushing the boundaries of what's possible. This trivia question focuses on a groundbreaking product design innovation that revolutionized modern commercial aviation and significantly improved fuel efficiency. Test your knowledge about this game-changing technology that's now standard on most new commercial aircraft.

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Winglets
Sharklets
Blended Wing Bodies
Variable Camber Wings