Which geographical feature-inspired retail innovation was first introduced by Amazon in 2013 to revolutionize delivery in densely populated urban areas?

In today's global retail landscape, geography-specific innovations are revolutionizing how products reach consumers across different terrains and populations. Retail technology adapts to unique geographical challenges - from densely populated urban centers to remote rural areas. This trivia tests your knowledge of how retail technology has evolved to address geography-specific market needs and created groundbreaking solutions that transform local commerce patterns.

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Mountain Hub Delivery (using elevation points for central distribution)
Amazon Locker (secure self-service kiosks for package retrieval)
River Route Networks (waterway-based distribution channels)
Desert Drone Delivery (heat-resistant autonomous delivery for remote areas)