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Essentials Of Fire Department Customer Service Practice Test

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Which word completes the phrase 'Closed systems' as presented?
Correct Answer:
Die
Explanation:
Understanding how a word completes a phrase to convey a natural idea about systems is key here. When a system is closed and cannot receive input from the outside world, it cannot sustain itself indefinitely; resources and energy become depleted, processes wear down, and the system eventually fails. Using the verb die makes a concise, strong statement: “Closed systems die.” It clearly communicates that the fate of a closed system is to cease functioning over time. The other options don’t fit as well. Open would contradict the idea of a closed system and isn’t a natural completion. Expand suggests growth, which isn’t typical for a truly closed system. End is possible but weaker and less idiomatic for this context.

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