This example shows a simple face constructed with SVG shapes: a yellow circle for the head, two black eyes, and an arc-shaped smile. The code uses D3 v5 selection methods like `select` and `append` to build the SVG hierarchy, and leverages the `arc` generator to define the curved path for the mouth. The visualization is rendered entirely through SVG elements within a 960x500 canvas, demonstrating a minimal setup for a React-based D3 project.