Which of the following statements best describes where redox features are commonly found?

Redox features, or reductions-oxidation features, are commonly associated with waterlogged conditions that result in anaerobic environments, which can lead to the presence of specific color changes in the soil. These features manifest as reddish, brownish, or grayish mottles in the soil matrix, reflecting the fluctuating water table and changes in saturation.

Drained wetlands, especially those that have historically been saturated and are subject to prolonged periods of inundation, significantly influence soil chemistry. When these wetlands are drained, the oxidative processes can alter the soil colors, marking the redox features quite prominently. This is due to the presence of iron and other minerals that undergo oxidation and reduction depending on moisture levels. Therefore, drained historic wetlands serve as prime examples of where these redox features are observable, with distinct color variations resulting from previous saturation levels.

In contrast, undisturbed areas may not display as clear redox features due to stable moisture regimes, while highly urbanized regions often undergo soil compaction, contamination, and significant alteration that can obscure or destroy such features. Sandy soils, being well-drained, are less likely to exhibit the prolonged saturation required for redoximorphic features to develop, as they drain quickly after rainfall or irrigation. As a