Answer:
Open-pit mining, also known as open-cast or open cut mining, is a surface mining technique of extracting rock or minerals from the earth by their removal from an open-air pit, sometimes known as a borrow.
Explanation:
Explanation:
- Rocky mountains are younger than the Appalachian mountains.
- Rocky mountains are located at the western parts of north America whereas Appalachian are located in the eastern parts of the north america.
I would go with D,I mean it's not like you can bring back the extinct animal
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