This example shows how React manages interactive SVG graphics through a single circle element. As the mouse moves over the viewport, the circle’s center point follows the cursor’s coordinates. The code uses React’s `useState` hook to store mouse position, an `onMouseMove` handler on the SVG element to capture the cursor location, and `ReactDOM.render` to output the visualization. The rendering uses a plain SVG circle with a fixed radius, whose `cx` and `cy` attributes are updated dynamically.