This bubble chart compares engine performance across car makes, plotting horsepower on the x-axis against torque on the y-axis while encoding highway fuel efficiency as the radius of each circle. The color of each bubble corresponds to the car manufacturer, using a categorical scale with `d3.schemeTableau10`. The visualization is rendered as SVG using D3 v7, with linear scales for the axes and a sqrt scale for bubble size. Data comes from a local `cars.csv` file with aggregated values per make.