This example demonstrates the minimal setup required to begin using D3 version 7, displaying the text “Hello D3 version 7” in the center of the page. The code imports the `select` function from the D3 library and applies it to the `body` element, setting its text content. The page includes D3 via a CDN link and loads the visualization logic from a separate `bundle.js` file, while the CSS styles define the large, centered font size.