Which soil layer is characterized as the stony part, lacking organic matter?

The correct choice is related to the specific characteristics of soil layers and their composition. The subsoil, known as the B Horizon, is typically located beneath the topsoil (A Horizon) and directly above the C Horizon. It is distinguished by its accumulation of minerals leached from the upper layers, such as clay and silt. This layer is indeed more compact and may contain stones, but it still retains some organic material due to its close proximity to the topsoil.

Conversely, the C Horizon is recognized as the layer that contains broken rock or parent material, which is stony and doesn't contain soil, hence lacking organic matter. This layer serves as the foundation from which soil is developed, demonstrating a greater resemblance to unweathered geological materials. When considering all choices, the C Horizon matches the description of being the stony part that lacks organic matter more accurately than the subsoil.

The O Horizon is predominantly composed of organic materials such as decomposed leaves and other plant matter. Therefore, it is abundant in organic content. The B Horizon, although it can contain minerals and may have some organic components, is not primarily defined by its lack of organic matter, which is characteristic of the C Horizon. Thus, recognizing the specific characteristics of these