This bubble chart visualizes the relationship between average horsepower, torque, and highway MPG for various car makes, with each bubble’s position determined by horsepower and torque on the x- and y-axes, and its size encoding MPG. The data comes from a CSV file loaded via `d3.csv`. The chart uses D3 v7 scales (`d3.scaleLinear`) for axes and bubble size, `d3.scaleOrdinal` with `d3.schemeCategory10` for color, and SVG circles with interactive tooltips that display make and metric values on mouseover.