A gallery example renders basic geometric shapes using D3 v5 selections, displaying a rectangular frame drawn as a path with circles and ellipses in steel blue fill. It pairs a large circle with a horizontally flattened ellipse, a small circle with a vertically stretched ellipse, and a large circle with another horizontal ellipse. The code uses `select` to target the SVG element, while `append` creates each shape and attributes like `cx`, `cy`, `rx`, and `ry` define their positions and dimensions.