This bar chart displays the fuel efficiency of cars from 20 manufacturers, sourced from a CSV file accessed via a gist URL. Built with React and D3 v5, it uses `scaleBand` for the categorical y-axis and `scaleLinear` for the numeric x-axis. The SVG rendering positions named bars, with axis ticks drawn from `xScale.ticks()`. Data is loaded asynchronously via `d3.csv`, and the chart is rendered inside a React component using `ReactDOM.render`.