Six random smiley faces are arranged in a grid to demonstrate code reuse through React components. Each face’s eyes, mouth, and stroke vary randomly, showcasing how modular components can be composed with different props. The visualization uses React 17 and D3 v6, relying on `arc()` for the mouth, `range()` for the grid, and SVG via JSX. Rendering occurs through `ReactDOM.render`, with all geometry parameterized inside reusable components.