Which environmental feature is a low-relief area composed of debris spread by meltwater?

The correct answer is an outwash plain, which is characterized as a low-relief area formed by the deposition of sediment carried away from a glacier by meltwater. During the melting of glacial ice, large volumes of water transport sediment and debris, which accumulate in horizontal layers, resulting in the flat, broad expanse typical of an outwash plain.

This feature is distinct because it is specifically associated with glacial environments, where the meltwater plays a crucial role in reshaping the landscape. The materials deposited include a mix of sand, gravel, and silt, creating a well-drained area that can support various types of vegetation and wildlife.

The other options refer to different landforms. A kame is a hill or mound of sorted gravel and sand deposited by glacial meltwater, typically found at the edge of a glacier rather than as a vast plain. An alluvial fan is a sedimentary feature formed where a river leaves a narrow mountain range and spreads out into a larger valley, differing in formation context and characteristics. A lake plain is a flat area formed by sediment deposits in a lake bed, which is also not related to the meltwater process associated with glaciers. Therefore, the unique formation process of an outwash plain