This example demonstrates an animated scatter plot of the Iris dataset, using D3 v6 with React. The plot cycles through different x-axis variables (petal length, petal width, sepal length, sepal width) every two seconds, with circles transitioning smoothly via `selection.join` and `transition`. Species are encoded by distinct symbols from `d3.symbols` and `scaleOrdinal`. The reusable chart function exposes setters like `.xValue()` and `.yValue()` to update the visualization, while axes are redrawn using `axisLeft` and `axisBottom`.