{"version":"1.0","type":"rich","title":"Activity7_Q2","description":"A stacked area chart displays population trends by continent over time, aggregating country-level data into five continental groups. D3 v6 loads population data from a CSV URL and maps countries to continents before stacking the values. The visualization uses `d3.stack`, `d3.area`, `scaleTime`, `scaleLinear`, and `scaleOrdinal` to render smooth curves with a color legend. Data spans multiple years, with axes formatted via `axisBottom` and `axisLeft`. The chart renders as an SVG appended to the HTML body, with the `curveBasis` interpolation applied to the area generator.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/32dbb3411ebe478282141b712077e1a8?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}