Smiley
A smiling face is drawn as a yellow circle with black outlines, using two smaller circles for eyes and an arc-shaped path for the mouth. The visualization is built with React, where the SVG elements are declared in JSX. It uses D3’s `arc` function to generate the mouth’s path data, with explicit angles and radii controlling the smile’s curvature. The complete graphic is rendered to the page via `ReactDOM.render`.