This example demonstrates how to fetch and summarize CSV data using D3 version 7. It loads a remote customer dataset with `d3.csv`, then displays the file size in kilobytes, row count, and column count as plain text in a preformatted HTML element. The page also includes a separate script that uses `select` from D3 to replace the body content with a simple greeting. The visualization shows basic data-loading and metadata-reporting techniques rather than graphical rendering.