A zoomable treemap visualizes the hierarchical distribution of top-grossing movies, grouped by genre, with each tile sized and colored by category. The visualization uses D3 v5’s `d3.hierarchy` and `d3.treemap` to compute the layout, while click interactions and a zoom-out button invoke transitions that re-scale the x and y domains for drill-down navigation. Movie data is loaded from a local JSON file, and tooltips display details on hover.