This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG for various car makes. Each circle represents a car brand, positioned by its horsepower and torque values, with the circle's radius scaled to its highway MPG using `d3.scaleLinear`. The color of each bubble is assigned via a `d3.scaleOrdinal` with an `interpolateTurbo` palette, and a legend maps bubble sizes to MPG values. Data is loaded from a CSV file, and interactive tooltips appear on hover using D3's selection and transition methods, all rendered as an SVG.