I think the answer would be all of them but im not sure about the third part
The given statement "wilderness ecosystems are dynamic, complex, and often fragile, and may be impacted by human use and activities occurring both within and outside wilderness boundaries," is true.
Wilderness ecosystems
The wilderness ecosystem is the ecosystem that has been left undisturbed by humans. There are many areas on the planet that are considered wilderness such as the Great Barrier Reef, the Amazon forest, etc. They are rich in both flora and fauna diversity.
In the United States, a total of 42× 
ha is under the protection of the National Wilderness Prevention System. They are the lands devoted to the protection of the natural ecosystem. Such an arrangement had to be made due to human encroachment and various other factors that affect the wilderness ecosystem. The main threats to the wilderness ecosystem are
- Using the land for recreational uses
- Grazing by livestock
- Forest fire
- Pollution
- Global warming
- Invasion of alien species
- The unnatural flow of water due to diversions, dams, impoundments, etc.
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The student put under the "physical changes" portion of the poster about aluminum is option "B".
<h3>What is the boiling point and melting point of aluminum?</h3>
The melting point of aluminum is 933.47 Kelvin, 660.32 degrees Celsius, or 1220.58 degrees Fahrenheit.
It's normal boiling point is 2792 Kelvin, 2579 degrees Celsius, or 4566 degrees Fahrenheit.
Thus, Options "B" aluminum met at 660 degree celcius.
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Answer:
The endocrine system
Explanation:
Endocrine basically means "having to do with galnds that produce hormones and release them into the bloodstream."
PLATO
The US population most closely represents a clumped pattern, as humans are social animals who interact regularly. The United States has higher populations near major cities, which generally have more resources than rural areas.
