Smiley face Part I
The visualization renders a smiley face as a static SVG composed of geometric primitives, including a yellow circle for the head, two smaller circles for eyes, and an arc-shaped mouth. The React application uses D3’s `arc` function to generate the mouth path, positioned relative to the center of the canvas. Coordinates and radii are defined as constants, and the React component returns an SVG element with nested `<circle>` and `<path>` elements, demonstrating a programmatic approach to drawing with D3 and React.