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.

~kinetic ~potential

explanation:

kinetic and potential energies would be types of mechanical energies.

the earthquake in haiti was a magnitude of 7.0 according to the u.s geological survey yet the smaller earthquake in haiti killed more than 200,000 and left more than 1.2 million people homeless. the chile earthquake was a magnitude of 8.8 and 500 times more stronger but chile's earthquake only injured 712 people.