This scatter chart displays the Iris dataset, allowing users to explore relationships between sepal and petal measurements through interactive dropdown menus. The visualization supports both quantitative and categorical axes; selecting "Species" switches the scale from a linear to an ordinal mapping. Built with React managing state and D3 v7 handling the SVG rendering, it uses `d3.scaleLinear` with `.nice()` for numeric axes and `d3.scaleOrdinal` for the categorical dimension. Data is loaded asynchronously from a CSV file using the `d3.csv` parser.