This scatter plot shows the relationship between sepal length and petal length for three iris species, with each species distinguished by a distinct shape marker and a shape legend. Built with d3.v7, it uses the `scaleLinear` and `scaleOrdinal` APIs to map data to coordinates and shapes, while `axisLeft` and `axisBottom` render the axes. The data is loaded from a CSV file fetched from a GitHub repository, and the visualization renders shapes using the `symbol` generator from D3’s `symbol` module.