Question

how is positive feedback different from negative feedback?
positive feedback amplifies (increases) the stimulus, while negative feedback reduces the stimulus.
positive feedback reduces the stimulus, while negative feedback amplifies (increases) the stimulus.
both reduce the stimulus.
both amplify (increase) the stimulus.

Explanation:

In biological and general systems, positive feedback loops enhance or amplify a stimulus (e.g., blood clotting, childbirth contractions), and negative feedback loops work to reduce or dampen a stimulus to maintain homeostasis (e.g., temperature regulation, blood glucose control). So the correct description is that positive feedback amplifies the stimulus and negative feedback reduces it.

Answer:

A. Positive feedback amplifies (increases) the stimulus, while negative feedback reduces the stimulus.