This interactive scatter plot visualizes the classic Iris dataset, displaying the relationship between sepal length and sepal width across 150 flower samples. It uses D3.js v7 with the d3-rosetta library to implement a unidirectional data flow pattern, where a single `viz` function handles all rendering based on centralized state. The visualization loads data asynchronously with loading and error states, and includes responsive dimensions, axes with labels, and circle marks rendered via D3 scales and the `one` utility for DOM element management.