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

Which of the following definitions best describes 'phreatic eruption'?

A. Strombolian Eruptions are characterised by huge clots of molten lava bursting from the summit crater to form luminous arcs through the sky. Collecting on the flanks of the cone, lava clots combine to stream down the slopes in molten rivulets. The explosions are driven by bursts of gas slugs that rise faster than surrounding magma
B. the concept is an explosion that follows the transformation of groundwater into steam. No incandescent or juvenile material is erupted.
C. Eruption Type 1 - produce juvenile clasts during explosive decompression from gas release. [Wikipedia]
D. An eruption from the side of a volcano (in contrast to a summit eruption.)

Answer: the concept is an explosion that follows the transformation of groundwater into steam. No incandescent or juvenile material is erupted.