A modular React smile face rendered as SVG, composed of reusable components for the head, eyes, and mouth. The face is assembled from a yellow background circle with a dark stroke, two offset eye circles, and a curved mouth path generated with the d3 `arc()` generator using specified inner and outer radii and angular ranges. The `FaceContainer` component draws the SVG and translates the drawing to a central point, while parent props control all dimensions and positions.