This animated scatter plot cycles through the four Iris dataset features on the x-axis while the y-axis displays sepal length. Data points are colored by species: green for setosa, yellow for versicolor, and blue for virginica, with a corresponding legend. Built with D3 v6, the visualization uses the `scaleLinear`, `axisLeft`, and `axisBottom` APIs from the `d3` module within a reusable `scatterPlot` function. The SVG output updates at intervals, redrawing axes and labels to reflect the changing feature selection.