This example displays the text “Hello D3 version 7” centered on a blank page at an enormous font size, demonstrating the basic setup of a D3 v7 project. It uses the `select` method from the `d3` library to target the page’s body element and then calls `.text()` to set its content. The page loads D3 v7.6.1 from a CDN and relies on an external `bundle.js` file to execute the JavaScript logic.