This example shows a classic yellow smiley face drawn with scalable vector graphics, centered in the browser window. The face is composed of a large filled circle for the head, two smaller circles for the eyes, and a curved mouth created as an arc. The visualization uses React to render the SVG elements, with dimensions and positions calculated from constant values. The mouth is generated using D3’s `arc` method, which defines an annular sector with specified inner and outer radii and angular range for a smile shape.