The ICE8 - TREE example shows a tree diagram of LinkedIn job postings, organized hierarchically by industry, location, and employment type. It uses the d3.js library (version 6) to render the structure. The code constructs a dataset with branches for tech and health, then applies `d3.tree()` layout to position nodes. Links are drawn with `d3.linkHorizontal()`, while node shapes vary by depth: diamonds for the root, circles for industries, rectangles for locations, and stars for job types. Labels are added via SVG `<text>` elements. Styling uses CSS for pink background, purple headings, and gray links.