This stacked bar chart visualizes the proportion of sepal length and sepal width measurements across three iris species, demonstrating how these attributes vary by category. Each species is represented as a full-height bar segmented into two colored sections, with the y-axis showing the summed measurement values. The visualization uses d3.stack() to construct the stacked series and d3.scaleBand with d3.scaleLinear for positioning. Hovering over any segment triggers a tooltip displaying the species and exact value, while d3.axisLeft and d3.axisBottom label the axes. Data comes from the included CSV file.