This example demonstrates how to create separate color and size legends using D3 v6 in a React application, rendering with SVG. The color legend uses `d3.scaleOrdinal` to map fruit names to colors, while the size legend uses `d3.scaleSqrt` to represent numerical values through circle radii. Both legends are built with reusable functions that append groups, circles, and text elements, highlighting the pattern of entering and merging selections for dynamic updates.