This area chart shows population trends across continents from 2000 to 2020, with each continent represented as a stacked colored layer. The visualization uses d3.stack() to aggregate population data by year and continent, and d3.area() to render the stacked layers as SVG paths. Axes are generated with d3.axisLeft() and d3.axisBottom(), while colors are assigned via d3.scaleOrdinal() with d3.schemeCategory10. Data is loaded asynchronously from a remote CSV using d3.csv, and a custom legend identifies each continent.