Which of the following is a suborder of Spodosols?

The suborder of Spodosols is represented by the designation that includes "Aq." Spodosols are typically characterized by the presence of a leached, acidic horizon that is rich in iron and aluminum oxides, often with a significant accumulation of organic material. This leaching process is predominant in water-saturated conditions and typically occurs in cooler, humid regions where organic matter decomposition is less than the rate of accumulation.

The "Aq" designation indicates that these soils are associated with wet conditions, aligning perfectly with the environmental characteristics necessary for the development of Spodosols. Spodosols frequently develop in areas where water table levels impact soil formation, affecting the accumulation and leaching processes. The presence of a water table contributes to the formation of the characteristic layers within Spodosols.

Other suborder designations, such as "Al," "Ud," and "Flu," relate to different soil materials and conditions. "Al" is associated with soils that are alkaline, while "Ud" indicates soils that are not saturated with water for a significant portion of the year. "Flu" refers to fluvisols, which are formed by sediment deposition in river valleys and alluvial plains. Each of these other suborders reflects different hydrology and