This area chart visualizes India’s population from 1980 to 2020, with data points from a CSV file and a smoothed curve using `d3.area` and `d3.curveBasis`. The chart uses `d3.scaleTime` and `d3.scaleLinear` for axes, rendered as SVG. Axis labels and tick formatting employ `d3.axisBottom`, `d3.axisLeft`, and `d3.format`. The line and area are styled with CSS classes, highlighting population growth over four decades.