Final answer:
The substance that has a high albedo is a light-colored substance that reflects more radiation than darker surfaces.
Step-by-step explanation:
The substance that has a high albedo is a light-colored substance that reflects more radiation than darker surfaces. Light-colored surfaces like snow and ice have a higher albedo because they reflect most sunlight. On the other hand, darker surfaces like soot or dust have a lower albedo because they absorb more sunlight. For example, snow in Figure 13.9.3 has a higher albedo, causing it to reflect more sunlight and stay cooler.