This stacked bar chart displays car specifications—horsepower, torque, and highway mpg—for five vehicle makes, using d3.stack to compose the horizontal segments. Each bar’s segments are colored via d3.scaleOrdinal, with an x-axis linear scale and a y-axis band scale. The SVG rendering includes mouseover tooltips that show exact values, while the legend identifies each specification. Data comes from an inline CSV array within the code.