The feature of Earth that would reflect the greatest amount of incoming sunlight is sea ice. To determine this, we need to consider the concept of albedo, which is the measure of how much light an object reflects. Sea ice has a high albedo, meaning it reflects a significant portion of the sunlight that hits its surface. This is because sea ice is made of frozen water, which has a smooth and reflective surface. As a result, most of the sunlight that reaches the sea ice is bounced back into the atmosphere, leading to a high reflection of incoming sunlight.
The feature of Earth that would reflect the greatest amount of incoming sunlight is "sea ice."
