To sort the box colors by least dense to most dense based on their typical relative densities, we can think about the common materials associated with these colors in various contexts (like packaging, objects, etc.). Here's a general ordering based on common densities:
- Yellow (typically lighter materials like certain plastics)
- Blue (can vary, but often associated with lighter materials)
- Green (similar to blue, depending on context)
- Red (often associated with denser materials)
However, without specific context about what these colors represent (like types of paints, plastics, etc.), the density order can vary. If we're making a general assumption, the above order could work. Please adjust if you have specific materials in mind!