Step 1: Understanding the Question:
This question tests knowledge of soil horizons and parent material.
Step 2: Detailed Explanation:
Regolith (B) is the unconsolidated material above the parent material.
It includes weathered rock, soil, and other loose material.
Regolith is the layer from which soil develops.
Other terms:
- Profile (A): The vertical section of soil from the surface to the parent material.
- Solum (C): The upper part of the soil (A and B horizons) that has been modified by soil-forming processes.
- Pedon (D): The smallest volume of soil that represents the soil profile.
Thus, regolith is the unconsolidated material above the parent material.
Step 3: Final Answer:
Thus, the unconsolidated material above the parent material is called regolith, which corresponds to option (B).
[0.5cm]