This visualization compares sepal dimensions across three Iris species using a D3.js scatter plot. It presents sepal length and sepal width for each flower, with points colored by species according to a supplied BBC color theme. The code utilizes `d3.csv` for data loading, `scaleLinear` and `scaleOrdinal` for scales, `axisBottom` and `axisLeft` for axes, and supports interactive point fading through a legend. Data comes from Fisher's Iris dataset.