A modular smiley face built with React and SVG, composed of a yellow background circle, two black eyes, and an arched mouth. The face is centered within a 960x500 viewport using a FaceContainer that applies a translate transform. The mouth is drawn with a `d3.arc()` path, while eye and circle positions are controlled via props. The code defines reusable components—BackgroundCircle, Eyes, and Mouth—and renders them through the main Face component, demonstrating a component-based approach to data-visualization primitives.