A radial gradient composition depicts a stylized sunrise, rendered as a series of five concentric arcs. The code uses D3 v5 to generate paths via `d3.arc()`, with each arc filled by a `radialGradient` defined in SVG `defs`. Each gradient inherits from a base white-to-blue gradient using the `href` attribute, while varying focal and outer radii create layered slices. The arcs span from -90 to 90 degrees, forming a half-circle with light grey strokes, illustrating procedural gradient reuse.