This example shows a single line of text, “Hello D3 version 7,” centered on a plain white page. It renders the words at an enormous 13em font size, making the message the entire focus of the visualization. The code uses the D3 library’s `select` method to target the document body and its `.text()` method to set the content. It is a minimal demonstration that D3 version 7 is correctly loaded and functioning within a simple HTML page.