Answer:
D
Explanation: The great depression was sad and there was no money:(
The 15th Amendment to the Constitution granted African American men the right to vote by declaring that the "right of citizens of the United States to vote shall not be denied or abridged by the United States or by any state on account of race, color, or previous condition of servitude."
Answer:
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.
Stromatolites are the fossils found in the younger layer.
They remained focus on farming and trading
