A single yellow circle, centered on an SVG canvas, demonstrates the fundamental structure of an HTML page. The circle is drawn using the SVG `circle` element with a `fill` of yellow and a thick `stroke-width` of 10. The example shows how basic SVG shapes can be embedded directly within HTML, without any JavaScript libraries or external data. The page uses an inline `<style>` block and a minimal document structure, highlighting the simplicity of creating graphics with raw SVG in a web document. The circle's positioning and radius are specified as static attributes.