This example uses D3.js and React to render a simple, stylized face in an SVG. It draws a large yellow circle for the head, two black circles for the eyes, and a smiling mouth created with the `d3.arc` path generator, all centered within a 960×500 viewport. The code explicitly sets the head’s radius based on the SVG’s height, while the eyes and mouth use fixed pixel offsets and arc angles. The visualization demonstrates basic SVG shape creation and geometric positioning with D3’s `select` and `attr` methods.