This stacked bar chart visualizes health condition counts across racial groups using CSV data from health_indicators_2019.csv. The d3.stack() function layers conditions as colored segments, with d3.scaleBand, d3.scaleLinear, and d3.scaleOrdinal handling positioning and colors. Rectangles are appended to SVG groups, while mouseover, mousemove, and mouseleave events trigger a simple HTML tooltip displaying each segment’s count.