This area chart visualizes student marks against roll numbers, using data loaded from a remote CSV. The chart is rendered as an SVG using D3 v7, with a red filled area and labeled axes for 'Year' and 'Population.' The code constructs linear scales, applies an area generator, and adds axes using `d3.scaleLinear`, `d3.area`, `d3.axisBottom`, and `d3.axisLeft`.