This example presents a stacked bar chart that visualizes the religious demographics of various countries, using population as the quantitative value and religion as the categorical color scale. The chart employs D3.js version 7.8.5, leveraging its `scaleLinear`, `scaleBand`, `flatRollup`, and `stack` APIs to aggregate and structure the data from a CSV file. The visualization includes interactive hover effects on the legend, which highlights corresponding bars in the chart, and the axes are rendered using the `@curran/responsive-axes` module.