Answer:
All of the above.
Explanation:
For the study of protected animal species, biologists should follow some steps. Those animals which are in protective condition are placed in the natural environment so that they can live their natural life and can reproduce easily. So, for inspecting the animals in their area, the biologists should move on to the area where they live. Along with this, they have to apply for permission to enter into the habitat of the animals because they are protected. We know that entering into a protected area is not possible without permission.
Most organic acids are weak. Hydrogen fluoride (dissolving in water to produce hydrofluoric acid) is a weak inorganic acid that you may come across elsewhere.
...
acid Ka (mol dm-3)
hydrofluoric acid 5.6 x 10-4
methanoic acid 1.6 x 10-4
ethanoic acid 1.7 x 10-5
hydrogen sulphide 8.9 x 10-8
A biologist .....they study living things only.
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.
Learn more about ecosystems here:
brainly.com/question/12737609
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