This D3 v5 visualization displays the Iris dataset, mapping sepal length and petal length along the x and y axes, with species encoded as color. The scatter plot uses circles to represent individual samples. The code loads data from a CSV file, employs `d3.scaleLinear` and `d3.scaleOrdinal` with `d3.schemeCategory10`, and renders axes via `d3.axisBottom` and `d3.axisLeft`. A color legend is added using the `d3.legendColor` API from the d3-legend library.