This chart displays a monthly breakdown of expenses as a pie chart, with each slice representing a category and its corresponding value from the loaded CSV file. The visualization uses D3.js (v7) to load the data via `d3.csv`, compute angular positions with `d3.pie`, and render colored slices and labels using `d3.arc`. A legend on the right lists each category and its numeric amount, while the chart is drawn as SVG elements within a 900x500 viewport. The title clarifies the chart’s focus on monthly expenses.