This example demonstrates fundamental SVG shapes—circles, rectangles, lines, and paths—rendered directly in an HTML document. It shows how SVG elements create basic visual marks with varying fill and stroke properties, including a filled circle, an outlined circle with a blue stroke, a yellow rectangle with a thick navy border, and a simple polyline path. The code uses plain SVG markup with attributes like `cx`, `cy`, `r`, `x`, `y`, `width`, `height`, and `d` for the path, with no external libraries or data sources. The rendering approach is static inline SVG within a 960×500 viewport.