This example displays a large, centered circle in an SVG container with the text “Hello D3 version 6” rendered in the page body. It demonstrates the basic setup for a D3 v7 project, using `d3.select` from the imported `d3` module to target the body element and set its text content. The HTML includes a static SVG with a circle element, while the JavaScript initializes D3’s selection API. The circle’s radius is fixed at 400, with no dynamic data binding or interaction, serving purely as a starting point for building more complex visualizations.