Which of the following statements about positive feedback mechanisms is not true?
a. Positive feedback mechanisms can result from human activity.
b. Positive feedback mechanisms can occur naturally.
c. Positive feedback mechanisms lead to increased change.
d. Positive feedback mechanisms reduce change in a system.
Please select the best answer from the choices provided
AB
D
000O

The correct answer is: d. Positive feedback mechanisms reduce change in a system. Explanation: 1. Positive feedback mechanisms amplify or increase changes in a system rather than reducing them. 2. For example, in climate change, a positive feedback loop occurs when rising temperatures melt polar ice caps. The melting ice reduces the Earth's reflectivity, causing more sunlight to be absorbed, leading to further warming and more ice melting. 3. Therefore, positive feedback mechanisms do not reduce change but rather exacerbate or amplify it. If you have any more questions or need further clarification, feel free to ask!