This tree graph visualizes survey data on ASD traits, showing the presence or absence of these traits, then branching into ethnicity, gender, and jaundice status. The hierarchical data is encoded using both branch structure and color values within the nodes. Using the D3.js v7 library, the visualization renders an SVG with circles for nodes and connecting paths, where each leaf node displays its numerical value. The code constructs this tree directly from a hardcoded JavaScript data object, with node colors set to specific hex values in the data.