This example uses D3.js (v7) to draw a simple yellow face on an SVG canvas. The visualization shows a circle for the face, two smaller black circles for eyes, and an arc-shaped path for a mouth. The code uses D3's `select` and `append` functions to build the SVG elements, and the `arc` function to generate the mouth path with specified inner and outer radii and angular range. The entire composition is centered on the canvas using a group element with a translate transform.