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An example of a positive feedback loop ________.
a. are birds migrating south in response to colder temperatures
b. is a thermostat turning on the furnace as the temperature drops
c. is melting arctic snow exposing dark surfaces that heat up and cause further melting
d. are predators eating most of their prey and then declining in numbers
e. is a pond becoming more acidic as a result of pollution.

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Answer:

The answer is option c. is melting arctic snow exposing dark surfaces that heat up and cause further melting

Explanation:

Positive feedback loop is the process that occurs when the product of a reaction exacerbates the reaction. Melting artic snow expose dark surfaces that heat up and result in further increase in melting.

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