This interactive donut chart visualizes mortality rates across ten countries, with each slice's arc length proportional to the death count from a CSV file. The chart displays country labels and uses a categorical color scale from `d3-scale-chromatic`. On hover, a tooltip appears showing the percentage of total deaths, calculated from the data. The visualization is built with D3.js using `select`, `pie`, `arc`, and `sum` from the D3 module, rendering as an SVG with custom styling for hover effects.