This example shows a single circle rendered inside an SVG element, demonstrating the basics of SVG fundamentals. The circle is positioned with `cx` and `cy` attributes and sized with `r`, all set to 50 units. The code uses no external libraries, relying purely on native SVG markup within an HTML page. The rendering approach is declarative, with the SVG circle drawn directly in the markup, making it a minimal starting point for understanding how SVG shapes work in a browser.