A horizontal bar chart visualizes fault localization data from a CSV file, showing suspiciousness scores for lines of code in two Apache Commons Java files, with each row labeled by identifier. The chart uses D3 v5's `scaleLinear` for the x-axis, `scaleBand` for the y-axis, and `axisLeft`/`axisBottom` for the axes. Steelblue rectangles are appended to an SVG canvas, sized by each line's suspiciousness value, providing a quick comparison of which code lines are most likely responsible for faults.