A pie chart visualizes low-income reading levels across U.S. states, with each slice colored by its corresponding value and labeled with the state name and numeric reading. The chart uses D3 v5’s `pie` and `arc` generators to compute segment angles and paths, while `scaleOrdinal` maps data values to a fixed color palette. A legend lists each state with its color swatch and formatted value, and the data is loaded from a CSV via D3’s `csv` function and rendered as SVG elements.