This bar chart displays the average monthly passenger counts for airlines operating out of San Francisco in 2021, sorted vertically by airline name. The visualization uses d3.scaleBand for the categorical y-axis and d3.scaleLinear for the numeric x-axis, rendering horizontal bars as SVG rectangles. Data is loaded asynchronously via d3.tsv from a remote GitHub gist, with axis labels and tick marks generated using d3.axisBottom and d3.axisLeft. Bar color is a uniform dark teal, and the chart includes rotated x-axis labels for readability.