This visualization displays a node-link diagram of a dataset containing chapters and submissions, rendered as an SVG. The code uses d3.select, d3.scalePoint, d3.scaleOrdinal, and d3.schemeCategory10 to position nodes vertically and color them by chapter. User interaction highlights primary and secondary links and labels on mouseover, using CSS classes to adjust stroke and fill. The example is built with React and relies on d3 for arc path generation and layout.