This interactive scatter plot visualizes automobile characteristics from the UCI Auto MPG dataset. Users select which attribute to display on the x-axis via a dropdown menu, with miles per gallon always plotted on the y-axis. The visualization uses D3 v5 with `csv`, `scaleLinear`, and `axisBottom` to render SVG circles whose opacity reveals data density. Data loading is asynchronous, and the chart re-renders whenever the selected column changes.