This example shows a minimal D3 setup that renders the text "Hello D3 version 7" in the center of the page using a very large font size. It uses the `select` method from D3 v7 to target the body element and set its text content. The page loads D3 from an external CDN and runs the code from a bundled JavaScript file. The visualization demonstrates the foundational step of binding data to the DOM with D3’s selection API.