My First Face
A yellow smiley face drawn with SVG circles and a mouth arc takes center stage. The code uses React to render the SVG structure and the d3 `arc` generator to create the mouth path. Each eye is placed using simple coordinate offsets, while the face radius and stroke width are derived from the chart dimensions. The entire face group is translated to the center of a 960 by 500 viewport, with the mouth arc configured between specified start and end angles.