This family tree visualization displays three generations of a family using a hierarchical tree layout. The D3.js visualization uses the `d3.hierarchy` and `d3.tree` APIs to position nodes and `d3.linkVertical` to draw connecting links as SVG paths. Each node is a colored circle, with distinct colors differentiating grandparents, parents, and children, including a node for "Me" and cousins. The SVG is fixed at 900x500 pixels, and the data is hard-coded as a JavaScript object within the script.