A reusable React component renders a smiley face, composed of a yellow circular background, two eyes, and an arc-based mouth, all positioned dynamically within the SVG canvas based on window dimensions. The code uses d3's `arc` generator within the `Mouth` component to define the mouth path, while `FaceContainer` and related components manage SVG grouping and attribute passing. The example demonstrates a compositional approach to building SVG visualizations in React, with all shape properties—such as eye offset, radius, and stroke width—passed as props to the `Face` component.