This example draws a stylized cat face using React and D3 v7, rendered as SVG. The face consists of a large circle for the head, two eyes with green pupils and purple centers, whiskers made from black lines, and ears formed by thick strokes positioned at the top corners. A mouth is generated by the `d3.arc()` function with an inner and outer radius, creating a curved shape. All elements are positioned relative to the center of a 960×500 viewport.