This example displays a single, centered text message reading “Hello D3 version 7” against a plain white background, using an extremely large font size to emphasize the greeting. The page loads D3 version 7.8.2 from the unpkg CDN and imports the `select` function from the d3 module to target the body element. The code then calls `.text()` on that selection to set the body’s content, demonstrating the simplest possible data-binding and DOM manipulation workflow in a starter template.