Final answer:
Amazon.com primarily uses the E-tailer business model, selling a wide range of products online directly to consumers and successfully undercutting prices of competitors. Its innovative production model and cost structure have enabled Amazon to dominate the market.
Step-by-step explanation:
Among the Internet business models, Amazon.com primarily uses the E-tailer model. As an E-tailer, Amazon operates much like a traditional retailer, but through an online platform. It sells a wide range of products, including books, directly to consumers.
Amazon has managed to crush its competition by revolutionizing the production model and cost structure, enabling it to offer lower prices even when including shipping costs. While Amazon has aspects of other business models, such as content provider through its Amazon Kindle services and market creator through its Amazon Marketplace, the core of its business aligns most closely with the E-tailer model.