This visualization displays a stacked bar chart of population by country, segmented by religion, with tooltips showing religious affiliation. It is built using the Vega-Lite API, registered with Vega and Vega-Lite libraries, and rendered as SVG. The code loads data from a CSV file via `d3.csv`, which contains the top five religions by country. The chart resizes to fit the window, uses custom axis and label styling for readability, and includes a Vega Tooltip handler for interactive data exploration.