A directed graph of 13 labeled nodes and 21 links shows a learning-path dependency structure, with nodes grouped into five color-coded categories. The layout is computed live using `d3.forceSimulation` with `forceX` and `forceY` forces to pull nodes toward predefined column positions per group, plus `forceLink` and `forceCollide`. SVG lines with `marker-end` arrowheads render the edges, and the data is imported from a JavaScript module.