This scatter plot visualizes the Iris dataset, mapping petal length on the x-axis against sepal length on the y-axis. Each flower observation is rendered as a circle using SVG, with axes generated via `d3.axisLeft` and `d3.axisBottom`. The code loads CSV data with `d3.csv`, scales positions using `d3.scaleLinear` with `d3.extent` for domains, and appends circles via `selection.join`. The visualization fills the browser window using `window.innerWidth` and `window.innerHeight`, with tick labels styled at 24 pixels in plain CSS.