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.

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