A scatterplot maps two selectable song attributes against each other for the top 100 Spotify tracks of 2018, with dropdown menus choosing danceability, energy, or other numeric features for the X and Y axes. Using React and D3 v5, the interactive chart renders circles as SVG marks with tooltips and scales axes via `scaleLinear`. The data is loaded as CSV from a GitHub gist, while reusable components like `AxisBottom`, `AxisLeft`, and `Marks` handle the visualization, and `ReactDropdown` provides the menu controls.