A gallery of pig-themed smiley faces, each rendered as a distinct SVG component with a pink circular background, two eyes, and a smiling mouth. The code randomly varies face parameters like stroke width, eye offset, eye radius, mouth width, and mouth radius to generate twenty unique faces. Built with React and D3.js, it uses the `arc` API from D3 to draw the mouth path and maps over a `range` array to produce the faces.