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Which sentence describes an example of a positive feedback loop? Warm-blooded animals sweat when they get too hot. Sweating is a method by which the body cools itself. A thermostat regulates temperature by turning a furnace or air conditioner on and off. When blood flows from a mild cut, blood clots form to prevent excessive bleeding. As oceans get hotter, they release more CO2, which then increases atmospheric and ocean temperatures.

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BioWizard
The correct answer is As oceans get hotter, they release more CO2, which then increases atmospheric and ocean temperatures.  

Positive feedback is a process which can be explained like this: A produces more of B which in turn produces more of A. In the example above, high-temperature oceans (A) produce CO2 (B) which then make temperature even higher (A).
mansoorahmedd67

As oceans get hotter, they release more CO2, which then increases atmospheric and ocean temperatures.

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