Task: Class Definition Understanding (ontology: Earth_Environment/SWEET)

Which of the following definitions best describes 'regolith'?

A. A mixture of water-saturated rock debris that flows downslope under the force of gravity (also called lahar or mudflow).
B. the concept (Greek: ‘blanket rock’) is a layer of loose, heterogeneous material covering solid rock (bedrock). It includes dust, soil, broken rock, and other related materials [Wikipedia]
C. the concept is a naturally occurring solid aggregate of minerals and/or mineraloids. In general rocks are of three types, namely, igneous, sedimentary, and metamorphic. [Wikipedia]
D. In chemistry, a the concept is a homogeneous mixture composed of two or more substances. In such a mixture, a solute is dissolved in another substance, known as a solvent. All solutions are characterized by interactions between the solvent phase and solute molecules or ions that result in a net decrease in free energy. [Wikipedia]

Answer: the concept (Greek: ‘blanket rock’) is a layer of loose, heterogeneous material covering solid rock (bedrock). It includes dust, soil, broken rock, and other related materials [Wikipedia]