A family tree chart visualizes hierarchical relationships across three generations, with names displayed beside circular nodes connected by blue curved links. Users can collapse and expand branches by clicking nodes, revealing or hiding descendants. The visualization uses D3.js version 3.5.17 with the `d3.layout.tree` and `d3.svg.diagonal` APIs for layout and path generation, and applies CSS styling with cyan nodes, red strokes, and an orange background. SVG rendering is animated with transitions set to 750 milliseconds.