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

Which of the following definitions best describes 'groundwater flow'?

A. the concept is the sum of evaporation and plant transpiration from the Earth's land and ocean surface to the atmosphere.
B. A water flow process which comprises a sudden‐onset high‐magnitude discharge of water and sediment from a glacial source
C. A material transport process during which liquid water is circulated in the vicinity of a heat source in order to absorb thermal energy and transport it away form that source.
D. A water flow process during which water is transported through an aquifer.

Answer: A water flow process during which water is transported through an aquifer.