This visualization presents a species-wise area chart of the total body mass for penguins, derived from the Penguins Size dataset. Using D3.js v7, the code groups the CSV records by species and sums the body mass values to generate distinct area segments. A band scale positions species along the x-axis, while a linear scale maps body mass to the y-axis. The `d3.area` generator draws the filled path, with `d3.axisBottom` and `d3.axisLeft` providing labeled axes. The chart renders as SVG, showcasing aggregated size trends across penguin types.