A three-dimensional heart rotates continuously within a responsive SVG container, its layered shapes creating a sense of depth and volume. The animation, driven by an animation frame loop in D3.js, updates a rotation angle that shifts each of the 20 heart-shaped paths horizontally and vertically. D3's `select`, `rgb`, and SVG path rendering construct the visual, while React's `useRef`, `useEffect`, and `useState` manage the container dimensions and animation state. The heart's colors and stroke opacity vary by depth to enhance the 3D effect.