A React-rendered SVG draws a stylized smiley face using D3’s `arc` generator for the curved mouth. The face is a circular gradient-filled shape with black stroke, positioned at the center of a 960×500 viewport, and includes two eye circles and two eyebrow lines. The code explicitly uses D3 v6 for the arc path and React 16.9 for component rendering, with all coordinates and radii computed from the viewport dimensions. The rendering approach is fully static SVG.