Answer:
Water
Explanation:
With no one managing the cities vast and complicated tap water and sewer networks there would be flooding
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The Earth'sinterior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun. The deepest layer is a solid iron ball, about 1,500 miles (2,400 kilometers) in diameter. ... Above the inner core is the outer core, a shell of liquid iron.
C. The answer could also be A but that would be informal