Ice is the material most likely to reflect light due to its smooth and highly reflective surface. When light hits ice, particularly in its solid state, a significant portion of that light is reflected rather than absorbed. This reflective capability contributes to the shimmering appearance of ice and snow, particularly in bright sunlight, where it can appear almost dazzling.
In contrast, dark soil tends to absorb most of the wavelengths of light that strike its surface, which makes it appear darker rather than reflective. Wood can reflect some light, but its texture and porosity often result in more absorption than reflection. Rocks vary widely in texture and color, but many types are also not highly reflective, as they often have rough surfaces that scatter light in different directions rather than reflecting it directly.