This visualization displays a scatter plot of the Iris dataset, mapping petal length on the x-axis against sepal length on the y-axis. It uses D3.js v7’s declarative API, including `select`, `scaleLinear`, `extent`, and `axisLeft`/`axisBottom`, within a minimal HTML page. The SVG canvas fills the browser window, with circles sized at radius 5. Data is fetched as CSV from a remote Gist and parsed into numeric fields before being scaled and rendered. The example demonstrates a concise, modern D3 workflow for building interactive plots.