This scatter plot visualizes the relationship between petal length and sepal width in the classic Iris dataset. Each red circle represents a flower sample, with axis labels and tick marks rendered using React and reusable D3 scale components. The code leverages d3.csv for data loading, d3.scaleLinear for coordinate mapping, and d3.format for tick label formatting, while all marks and axes are drawn as SVG elements within a React component hierarchy.