A circle rendered in steel blue sits centered on a 960×500 SVG canvas. The example demonstrates basic SVG shape creation with D3 v7, using the `d3.select` method to append a `circle` element and set its `cx`, `cy`, `r`, and `fill` attributes. The visualization is minimal, showing how D3 can generate and style SVG primitives while a separate stylesheet and an `index.js` file provide additional structure.