A modular React component assembles a smiley face SVG from separate circle, eye, and mouth parts. The face uses d3.arc to draw a half-circle smile, with a yellow background circle and two black eyes positioned by offset coordinates. All geometry is defined as props, making the face’s size, eye spacing, and mouth dimensions configurable. The face is rendered inside a centered SVG group, with the overall viewport fixed at 960 by 500 pixels.