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

Which of the following definitions best describes 'hydrothermal vent'?

A. A type of matrix consisting of inhomogeneous interstitial materials grown in originally open interstices during diagenesis, but lacking the homogeneity and clear textural evidence of pore-filling needed to classify as phyllosilicate cement.
B. Particles suspended, reducing visibility by scattering light; often a mixture of aerosols and photochemical smog.
C. The the concept is a deep zone of a body of water, such as an ocean or a lake, located below the range of effective light penetration. This is typically below the thermocline, the vertical zone in the water through which temperature drops rapidly. The lack of light in the the concept determines the type of biological community that can live in this region, which is distinctly different from the community in the overlying waters. The the concept is part of the aphotic zone.
D. A the concept is a fissure in a planet's surface from which geothermally heated water issues. Hydrothermal vents are commonly found near volcanically active places, areas where tectonic plates are moving apart, ocean basins, and hotspots.

Answer: A the concept is a fissure in a planet's surface from which geothermally heated water issues. Hydrothermal vents are commonly found near volcanically active places, areas where tectonic plates are moving apart, ocean basins, and hotspots.