A yellow smiley face rendered as an SVG with a black stroke, two circular eyes, and a curved mouth drawn using D3’s `arc` generator with start and end angles of π/2 and 3π/2. The face, eyes, and mouth are positioned relative to a central transform, with radius and offsets computed from fixed width and height values. The code uses React 17 and D3 v6, rendering the shape declaratively via React components and D3’s `arc` API.