This example demonstrates the foundational building block of SVG visualization: drawing a single circle directly within an HTML document. It uses inline SVG markup inside the HTML, with the circle’s position and size controlled by the `cx`, `cy`, and `r` attributes. The code renders a basic vector graphic without external JavaScript libraries, relying solely on browser-native SVG support to display the shape. It serves as a minimal starting point for understanding how SVG elements compose more complex data-driven charts and diagrams.