This bubble chart visualizes how movie ratings are distributed across six genres, with each circle representing the proportion of films in a genre falling into a rating category. The circle size encodes the proportion value using `d3.scaleLinear`, while genre colors come from `d3.schemeSet2` via `d3.scaleOrdinal`. Rendered as SVG with D3 v7, the chart uses `d3.scaleBand` axes and interactive tooltips shown on mouseover. The dataset includes genres like Documentary and Action, with rating bands from below 5.0 to above 8.5.