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

Which of the following definitions best describes 'meromictic lake'?

A. A lake underneath the surface of the Earth.
B. A lake which is contained in a depression formed by the deformation and resulting lateral and vertical movements of a lithosphere.
C. The deepest layer of water in such a lake typically does not contain any dissolved oxygen. The layers of sediment at the bottom of a the concept remain relatively undisturbed because there are no living organisms to stir them up.
D. A lake formed of a natural deposit of alphalt, a black, highly viscous liquid or semi-solid composed of fossil hydrocarbons.

Answer: The deepest layer of water in such a lake typically does not contain any dissolved oxygen. The layers of sediment at the bottom of a the concept remain relatively undisturbed because there are no living organisms to stir them up.