A bar chart visualizes the ratio of religions within each country’s population, with countries on the x-axis sorted by ratio and religions on the y-axis; color encodes the ratio, and hovering reveals the population value. The visualization uses the Vega-Lite API (vl) to define the bar marks and encodings, with data loaded from a CSV file via d3.csv. Rendering is handled by Vega and Vega-Lite, configured with custom axis and label styling, and the chart fits the full browser window using autosize.