Which of the following is an example of positive feedback

Asked by admin @ 02/10/2021 in Biology viewed by 342 People

Which of the following is an example of positive feedback? A) a person begins to sweat under the hot sun and moves into the shade B) a light rail system opens in a city and leads to decreased air pollution C) a fire starts in a forest, then spreads over thousands of acres D) people begin to
move out of an area following a natural disaster

Answered by admin @ 02/10/2021

Answer:

C) a fire starts in a forest, then spreads over thousands of acres

Explanation:

In positive feedback, an effect is amplified or enhanced by influencing itself. Usually the event occurs with a result. The result is such that it further amplifies the event resulting in increased production of the result. Hence a positive feedback loop is created where the result keeps on getting magnified.

Since a fire is started in an area in forest and then it spreads to acres as it encounters more and more dry foliage, it is an example of positive feedback. The result which is fire is magnified as more areas come under the fire.

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