This example demonstrates a minimal D3 setup by rendering a large, centered "Hello D3 version 7" message in the browser body using the `select` API. The page loads D3 v7.8.2 from a CDN and executes an `index.js` file that calls `select('body').text()` to inject the text. The HTML defines a 13em font size and centered alignment, while the JavaScript relies on D3’s selection module for direct DOM manipulation. It serves as a basic template for starting projects with D3 version 6 or 7.