This interactive family tree visualizes user engagement with questions, branching from "Visit" to "Attempted" and "Correct/Incorrect" paths, with colors encoding outcomes. Built with D3 v5, it uses a horizontal tree layout (`d3.tree`), SVG rendering, and animated transitions (`transition().duration()`) to smoothly collapse and expand nodes on click. The dataset (`treeData`) is loaded from a JavaScript module, and zooming is handled via the `d3.zoom` API.