A scatter plot visualizes the relationship between sepal length and sepal width in the Iris dataset. Each circle represents a flower sample, with a tooltip revealing its exact sepal length. Built with React and D3 v5, the visualization uses `scaleLinear` for both axes, `extent` for domain calculation, and SVG for rendering. The code handles CSV data loading through a custom `useData` hook, with axis components and marks created via React components.