This bar chart shows the average Titanic survival rate broken down by passenger class, with percentage labels displayed above each bar. The visualization uses D3.js v7 APIs including `d3.csv` for data loading, `d3.rollups` for grouping and computing means, `scaleBand` for the categorical x-axis, and `scaleLinear` for the continuous y-axis. The SVG rendering includes styled axes with custom formatting via `d3.axisBottom` and `d3.axisLeft`, wrapping text labels, and rectangular bar elements filled with a blue color. Data is processed from a local CSV file containing passenger records.