This bubble chart displays the relationship between horsepower, torque, and highway fuel efficiency across automobile brands, with bubble size encoding the third variable. The visualization uses d3.csv to load the data, d3.scaleLinear for the x and y axes, and d3.scaleSqrt for bubble radius. Interactive tooltips appear on mouseover using d3-transition to fade in detailed values. SVG circles are rendered with D3 v6, and axes are generated using d3.axisBottom and d3.axisLeft.