D. I had to make this twenty letters long so...
Answer:
Normal faults form when the hanging wall drops down. The forces that create normal faults are pulling the sides apart, or extensional.
Reverse faults form when the hanging wall moves up. The forces creating reverse faults are compression, pushing the sides together.
Trans current or Strike-slip faults have walls that move sideways, not up or down.
Explanation:
Answer:
B. All of these are drivers
Explanation:
The populations of lot of amphibians, with rare exceptions, are constantly on the decline around the world. The main reason behind this is the human activity, as it has caused lot of changes, pollution, and dangers for the amphibian populations, which has led lot of amphibians to be on the verge of extinction.
The pollution, especially of the waters, has been a major factor for the decline of the amphibian population. Lot of very toxic chemicals have made the water unsuitable for living and poisonous, which systematically killed off the amphibian populations.
The habitat loss, as with any other group of animals, has left the amphibians without places to live. They have been left without their shelters, food sources, mating grounds, and they have started to die out.
The invasive species, especially the predatory ones, have also had big negative impact. The amphibians didn't had any defense mechanism against the introduced predators, so they were easy prey and their numbers rapidly went down.
Explanation:
Both eras and periods are greater, but an era is more than 1 year
The answer is: [A]: troposphere .
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