This example demonstrates fundamental SVG shapes and styling, showing how a single rectangle can be rendered with a yellow fill, black stroke, and thick stroke width. It also includes CSS-based hover interactions that change the rectangle's fill to red and its stroke to black. The visualization relies on the SVG `<rect>` element embedded directly in an HTML page, with styling handled through both inline attributes and a `<style>` block using CSS transitions. The rendering approach is pure SVG, with no external JavaScript libraries or data sources involved.