This React Starter example renders a single, static SVG arc using the D3 `arc` generator to define its geometry. The `arc()` function constructs path data with an inner radius of 90, an outer radius of 100, and a starting angle of π/2, ending at 3π/2, producing a half-circle shape. The SVG is drawn inside a React component, which is rendered to the page via `ReactDOM.render`. The example demonstrates how to integrate D3’s path-generation utilities with React’s component model, though the resulting visualization is minimal, showing only the geometric path without any interactive or data-driven behavior.