What is an example of a negative feedback loop?

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试卷: LEED GA模拟题A[查看]
What is an example of a negative feedback loop?
A: Warming oceans releasing greenhouse gasses which would warm the ocean even more
B: A thermostat where the temperature feedback indicates to the system when to turn off
C: Increased heat island require more mechanical cooling which generates more greenhouse emissions causing need for more cooling
D: A warmer atmosphere melts more ice, changing the Earth’s albedo which further warms the atmosphere

参考答案: C

本题解释:
A item is a positive feedback loop;

C item is a negative feedback loop;

D item is a positive feedback loop.

vivi

the result should be B