Question: which two statements describe how soil horizons are formed?
Answer: Soil Profile Dig down deep into any soil, and you'll see that it is made of layers, or horizons (O, A, E, B, C, R). ... Most soils have three major horizons (A, B, C) and some have an organic horizon (O). The horizons are: O -(humus or organic) Mostly organic matter such as decomposing leaves.