This scatterplot shows the relationship between age and weight-to-desired-weight ratio for males and females, using semi-transparent circles colored by gender. The visualization loads CDC health data via `d3.csv` and renders it as an SVG with React components. Axes are built with custom `AxisBottom` and `AxisLeft` components using `d3.scaleLinear`, while a `d3.scaleOrdinal` color scale differentiates genders. A `ColorLegend` component displays the categorical color mapping, and each circle includes a native SVG `<title>` element for hover tooltips.