A choropleth-style bubble map and a time-series histogram show global migrant deaths, with brushing the histogram filtering the map’s city markers. The map uses `d3.geoNaturalEarth1` and `d3.geoPath` with world-atlas TopoJSON data, while the histogram applies `d3.bin`, `d3.scaleTime`, and `d3.brushX`. React manages state and rendering, with SVG output.