This example shows the simplest possible D3 visualization: a webpage that displays the text "Hello D3 version 6" centered on a blank page. The HTML file loads D3 v6 from a CDN and an external bundle, while the JavaScript imports the `select` function from the D3 library and uses `d3.select('body').text()` to set the body’s text content directly. There is no data or chart involved; the focus is purely on the initial setup and rendering of a string through D3’s selection API.