A bubble chart displays car makes by average horsepower on the x-axis and torque on the y-axis, with bubble size encoding highway MPG and color encoding vehicle category. The visualization labels each bubble with the car make and includes a categorized legend. Built with D3 v7, it uses `d3.scaleLinear`, `d3.scaleSqrt`, and `d3.scaleOrdinal` to map data, renders SVG circles and text, and loads its data from a CSV file.