Question

1. what is a positive feedback loop?

the output of a system stimulates another cycle of the system
a closed path that tends to reduce the activity of a body system
anything that causes a reaction or response
something that carries out a response

Explanation:

A positive feedback loop amplifies a system's output by triggering additional cycles of the same process, rather than dampening activity (which is negative feedback). The other options describe stimuli, effectors, or negative feedback, not positive feedback loops.

Answer:

the output of a system stimulates another cycle of the system