A static tree diagram shows the hierarchical structure of a daily meal plan, with a root node labeled "Meals" linking to Breakfast, Lunch, and Dinner, each with two leaf items like Pancakes, Biryani, and Pizza. The visualization uses React for component mounting, though the chart itself is rendered entirely with D3 v7 APIs, including `d3.hierarchy`, `d3.tree`, and `d3.linkVertical` to compute and draw the curved edges and colored node circles on an SVG canvas.