This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 31 car makes, with each make represented by a colored circle positioned by horsepower and torque axes and sized by MPG. Built with D3 v7, the visualization uses `d3.scaleLinear` for axes and bubble radius, `d3.scaleOrdinal` with `d3.interpolateTurbo` for color encoding, and includes a tooltip with mouseover events. The SVG includes a circle-size legend for MPG and a color legend for car makes, with data loaded from a CSV file.