This example demonstrates a minimal D3 v7 setup by rendering the text "Hello D3 version 7" in the browser using the `select` function from the `d3` module. The page loads D3 7.8.5 from a CDN and applies a large 13em font size centered on the body via inline CSS. The code imports `select` from the `d3` package and uses it to target the body element and set its text content, showing how to begin a project with D3 v7.