The unconsolidated material above the parent material is called

Correct option is B

The correct answer is (B) Regolith

Explanation:
• Regolith is a layer of loose, heterogeneous superficial deposits covering solid rock. It includes dust, soil, broken rock, and other related materials.
• In soil science, regolith refers to the entire mantle of unconsolidated material above the solid bedrock (R horizon). It consists of the A, B, and C horizons.
• While the A and B horizons are considered "true soil," the C horizon is often partially weathered parent material that is part of the regolith but not yet fully developed into soil.
• Regolith is essential because it acts as the reservoir for groundwater and the medium in which soil formation (pedogenesis) begins.

Information Booster:
• The term comes from the Greek words 'regos' (blanket) and 'lithos' (rock).
• Earth is not the only body with regolith; the Moon and Mars also have regolith layers formed by meteoritic impacts and weathering.
• The depth of the regolith can vary from zero (exposed bedrock) to hundreds of meters depending on the climate and geological history.

Additional Knowledge:
• Profile (Option A): A vertical section of the soil through all its horizons, extending into the parent material.
• Solum (Option C): Specifically refers to the "true soil," comprising only the A, E, and B horizons where biological activity is most intense.
• Pedon (Option D): The smallest three-dimensional unit of soil that can be recognized as a soil individual, usually ranging from 1 to 10 square meters in surface area.