This example demonstrates how to construct a simple face using D3.js shapes, specifically a mouth arc rendered in an SVG container. The code uses D3’s `select` method to access the SVG element and the `arc` generator to define the mouth’s geometry based on inner and outer radii and start/end angles. A dataset containing arc values is logged to the console for inspection, though no dynamic rendering occurs. The visualization is built with React-compatible D3 v7, rendering static SVG elements centered via a translation transform.