This example displays a single black circle centered within an SVG canvas. It serves as a bare minimum HTML page, demonstrating the basic structure of an HTML document with a head and body. The rendering uses the Scalable Vector Graphics (SVG) format, specifically the `<circle>` element with a radius of 100 units, to produce the visual. No external libraries or data sources are involved; the page relies entirely on native HTML and SVG, with the circle lacking explicit fill or stroke attributes, thus defaulting to black.