This scatter plot visualizes the relationship between life expectancy and new vaccinations, with each circle colored according to a species category using yellow, green, or brown. The visualization loads CSV data from a GitHub gist and renders circles as SVG elements using d3.scaleLinear, d3.extent, d3.axisLeft, d3.axisBottom, and d3.select. Axis labels and a title are added as text elements, while the circles use both radius and rx/ry attributes for sizing. The chart is built with D3 v5 within a plain HTML page, using window dimensions for responsive sizing.