Which retail giant developed a floating warehouse concept specifically designed to overcome geographic barriers in densely populated urban areas?

Test your knowledge about how geography shapes modern retail logistics! The physical landscape and geographic distribution of populations significantly impact how products reach consumers around the world. From natural barriers to transportation hubs, geography continues to be a crucial factor in retail supply chains despite our increasingly digital world. This question explores an innovative solution to a specific geographic logistics challenge.

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Amazon, with its patented 'airborne fulfillment center' using airships to deploy drones in metropolitan regions
Walmart, with its 'mobile distribution centers' on converted cargo ships navigating coastal cities
Alibaba, with its 'skyport network' of helicopter-accessible rooftop warehouses in Asian megacities
Target, with its 'underground logistics network' utilizing existing subway tunnels during off-hours