Response:
Water moves through the channels in a way akin to how water flows in pipes of a plumbing system.
Rationale:
The author compares the geysers' plumbing system with the underground channels filled with boiling water, illustrating that the movement of water within the channels resembles that through plumbing pipes.
The writer discusses the unpredictability of geysers, linking it to the frequent variations experienced by an underground channel filled with boiling water.
The analogy of the 'geyser plumbing system' is authentically employed due to the comparable nature of water flow in both channels and pipes.
Consequently, the most accurate response is the second option.
