Final answer:
The A horizon is the topsoil, and the B horizon is the subsoil in a typical soil profile.
Explanation:
The A horizon is considered the topsoil, consisting of a mixture of organic material with inorganic products of weathering. In contrast, the B horizon is considered the subsoil, an accumulation of mostly fine material that has moved downward resulting in a dense layer in the soil.
Learn more about Soil Horizons here:
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