What is a key aspect of a positive feedback loop that differentiates it from a negative feedback loop?
1) The output of a positive feedback loop reinforces the initial change, while the output of a negative feedback loop opposes the initial change.
2) Positive feedback loops always lead to instability, while negative feedback loops maintain stability.
3) Positive feedback loops are found in biological systems, while negative feedback loops are found in mechanical systems.
4) Positive feedback loops are characterized by a decrease in the output, while negative feedback loops are characterized by an increase in the output.