This scatter plot visualizes the classic Iris flower dataset, displaying sepal length against sepal width for 150 samples. Built with React and D3 v7, it renders circles as SVG elements with semi-transparent black fill, using D3 scales and axes for accurate positioning. Clicking a circle highlights it with a white fill and black stroke, demonstrating interactive selection within a React-managed state. The visualization uses `csv` loading for data parsing and `ResizeObserver` for responsive container dimensions.