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.

The answer is C. Positive feedback mechanisms lead to increased change

Positive feedback mechanism happen when there's a small change on a system make the certain condition even better. Example : Consumers A recommended our product to consumer B which in return will recommend our other product to consumer A

As long as it's giving a positive impact, it does not necessarily have to "increase: in change. For example , the emission of product A reduced as we reduced the emission of product B