A static SVG circle centered on a yellow-filled canvas demonstrates the simplest possible HTML page rendering a single geometric shape. The page uses inline SVG markup within an `index.html` file, with no JavaScript libraries or data sources involved. The circle is drawn with a `circle` element featuring a `fill` of yellow, a `stroke` of black, and fixed `cx`, `cy`, and `r` attributes. CSS rules hide page margins and overflow to present the graphic cleanly, mirroring the minimal "Hello HTML" example.