An ecosystem has abiotic(no living things like water and wind) and also biotic(living things) while a community is biotic things
Answer:
There are several tectonic provinces collectively called as crystalline providences.
Explanation:
- The geology of Appalachians consists of Blue Ridge, Piedmont, Adirondack, and the New England providences. They are known as Crystalline provinces.
- The sinking of the oceans continued about 270 million year ago due to which a huge mass of rocks was pushed westwards along the margins of North America and piled up to form the mountains.
- The Sierra Nevada is the youngest mountain range on the west coast of the United States.
The answer is C
We know it cannot be A because American was at the time opposed to being imperilastic because of previous history (revolutionary war)
We know it isn't b because they didn't use nuclear weapons
And they were fighting North Vietnam so it cannot be D
The number four would be the inner core