This example visualizes an organizational hierarchy as a tree graph using D3.js v5. The code loads employee data from a remote CSV file, then uses `d3.stratify()` to convert flat records into a hierarchical structure and `d3.tree()` to compute layout positions. Nodes are rendered as colored SVG circles—green for CEO, blue for CTO, orange for CFO, and red for HR Manager—with employee names displayed as text labels, while curved links connect managers to their direct reports.