This interactive scatter plot lets users explore relationships between numeric measurements—including Length, Eye Diameter, and Jaw—across different countries. Two dropdown menus dynamically select which columns appear on the x- and y-axes, triggering a re-render of the visualization. Built with D3.js v5, it uses the library's `select`, `csv`, `scaleLinear`, `axisLeft`, and `axisBottom` APIs, along with custom dropdown and scatter plot modules. Circles animate into position using `transition().duration(2000).delay()`, while axis labels update to reflect the chosen variables. Data comes from a local CSV file.