This example shows a simple smiley face drawn with SVG shapes, including a yellow circle, two eyes, animated eyebrows, and a mouth created using an arc path. The animation moves the right eyebrow up and down via chained `transition` calls with a two-second duration. Built with D3 v5 within a React framework, it uses `select` to target the SVG and the `arc` generator to construct the mouth, demonstrating basic SVG rendering and animation techniques in a minimal starter template.