Here's why:

* Color: Lighter colors like white and pale yellow reflect more sunlight than darker colors like black or brown. This is because darker colors absorb more of the light energy and convert it into heat.

* Surface Type: Smooth, shiny surfaces reflect more light than rough, dull surfaces. Think of a mirror reflecting a bright light versus a piece of rough cardboard.

Examples of highly reflective land surfaces:

* Snow and ice: These are highly reflective, especially fresh snow.

* Sandy beaches: The light color and reflective nature of sand contribute to high albedo (reflectivity).

* Salt flats: Similar to beaches, the white, flat surface of salt flats reflects a significant amount of sunlight.

Therefore, a bright white, smooth surface like freshly fallen snow would reflect the most solar radiation.