This example displays the text “Hello D3 version 7” centered on a blank page in a very large font size. It demonstrates a minimal setup for using D3 version 7, showing how to select a DOM element and replace its text content with a string. The code imports the `select` function from the `d3` module and applies it to the `body` element, setting its `text` property to the greeting. The page loads the D3 library from a CDN and runs the logic from a bundled script.