Question

what is positive feedback?
a change in a system that amplifies a previous change
a change in a system to which there is no response
a change in a system that does not correct the previous change
a change in a system that reduces the previous change

Explanation:

To determine the answer, we recall the definition of positive feedback. Positive feedback in a system is a process where a change in the system leads to further changes that amplify (increase) the initial change. Let's analyze each option:

• The first option: "a change in a system that amplifies a previous change" matches the definition of positive feedback.
• The second option: "a change in a system to which there is no response" is not related to positive feedback (positive feedback involves a response that amplifies the change).
• The third option: "a change in a system that does not correct the previous change" is more related to a lack of negative feedback (negative feedback corrects changes), not positive feedback.
• The fourth option: "a change in a system that reduces the previous change" is the definition of negative feedback, not positive feedback.

Answer:

a change in a system that amplifies a previous change