This example displays a scatter plot of daily steps against calories burned, with points sized by water intake and colored by month. Built with D3 v7 and SVG, it uses a reusable `scatterPlot()` component configured through a chaining API. The plot renders circles via `d3.symbol()` with `d3.scaleLinear` axes, a Tableau10 ordinal color scale, and a custom tooltip that appears on mouseenter, sourcing data from a linked wellness tracker CSV file.