Positive feedback loops .

A. result in stabilizing concentrations of a substance
B. are more common in natural systems altered by human actions
C. are loops in which inputs reverse a change that may cause damage to an ecosystem
D. are relatively common in nature compared to negative feedback

B. are more common in natural systems altered by human actions

Explanation:

Positive feedback loops: The term "positive feedback loops" is referred to as a phenomenon that is responsible for amplifying or enhancing changes and therefore due to this, a system moves away from the state of equilibrium state to make it unstable on a large scale.

In the question above, positive feedback loops are considered more common in the natural systems that are being altered by human actions.

Example:

1. When an employee models good behavior.

2. When a colleague meets or exceeds goals.

answer; (d) one tectonic plate plunges beneath another; (most common,convergent boundaries)

in this scenario it would be the consumer demand as most influential in making the decision. the band members need to figure out where and from whom they will make the most money, in other words who out of the two consumer groups - football fans or car drivers - will spend their money, who is more likely to contribute to their cause and buy what they are offering.