This D3.js bubble chart visualizes the correlation between average horsepower, torque, and highway MPG for various car makes. Each circle’s x-position, y-position, and size encode the three metrics, while its color categorizes the brand. The SVG rendering includes a legend for MPG values and a color-coded make key. Interactive tooltips appear on hover via mouse events. The visualization reads data from a CSV file and employs `d3.scaleLinear` for axes and bubble sizing, `d3.scaleOrdinal` for color mapping, and `d3.interpolateTurbo` for the color palette.