This reusable D3.js scatter plot visualizes the relationship between urban population percentage and fertility rate for EU countries in 2022, sourced from Worldometer population data. Written as a modular `scatterPlot()` function, it uses `scaleLinear`, `extent`, `axisLeft`, and `axisBottom` to render axes with red labels, while circles display tooltips on hover via a styled HTML `div` that shows each country's name. The SVG output adapts to the full window size, and the code includes commented-out logic for animated cycling through data columns, though that feature is not active.