This example demonstrates a single black circle drawn on a blank canvas using the SVG (Scalable Vector Graphics) format. The code defines the circle with explicit `cx`, `cy`, and `r` attributes, placing it at coordinates (50, 50) with a radius of 50 within the `<svg>` element. The visualization highlights the fundamental structure of an SVG graphic, showing how basic shapes are declared directly in HTML markup. No external libraries are used, and no data source is specified; the example serves purely as a minimal illustration of SVG's core drawing syntax.