A smiling face rendered with React and D3 fills the browser window against a solid red background. The visualization is built as a React component that leverages D3 v5 for drawing the facial features. It uses a static SVG element selected via `d3.select` and styled with a background color through D3’s style method. The example demonstrates a simple, direct integration of React for component structure and D3 for SVG manipulation, with no interactive or animated behavior present.