This interactive bar chart displays survey respondent demographics, with buttons to toggle between gender, age group, generation, and province categories. The horizontal bars show the percentage of respondents in each category, with labels indicating the exact values. Using d3.v5, the visualization loads CSV data, computes grouped percentages via `d3.nest()`, and renders SVG rectangles with animated transitions. Axes and labels are generated with `axisLeft`, `axisBottom`, and `scaleBand`, while button clicks trigger the `update` function to swap datasets.