Which sentence describes an example of a positive feedback loop?

The correct answer is option D.  

Explanation:

The positive feedback loop is referred to as the condition that increases or accelerates the effect of the original change in condition. In the given question all the examples are exhibiting negative feedback loop except last option.

In this process, the temperature rises the CO2 production which in turn increases the temperature of the ocean and atmosphere.

Thus, the correct answer is option D.

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