This example demonstrates fundamental SVG shapes using inline Scalable Vector Graphics markup. It shows two circles, one black and one red, along with a navy line rendered against the default white background. The code directly defines each element through standard SVG tags such as `<circle>` and `<line>`, specifying coordinates and styling attributes like `cx`, `cy`, `r`, and `stroke`. No JavaScript libraries or data sources are involved, as the visualization relies entirely on static SVG elements within the HTML document.