This example demonstrates the foundational use of SVG to render a single circle element, with the circle positioned by its `cx` and `cy` attributes and sized by its `r` radius. The code relies on plain HTML and inline SVG markup, using no JavaScript libraries or data files. The accompanying files also illustrate basic HTML structure, including a paragraph with an inline span, a series of div elements, and an image reference that loads a static PNG file alongside a local `d3.js` script in a separate markup document.