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This mining method uses terraces in very deep holes to extract iron and diamonds:

a) Strip mining
b) Placer mining
c) Open pit mining
d) Mountaintop removal
e) Subsurface mining

Answer :

Final answer:

The correct answer is (c) open pit mining, which involves digging terraces in very deep holes to reach and extract resources like iron and diamonds. It's important to distinguish this method from other types of mining, such as strip mining, placer mining, mountaintop removal, and subsurface mining, which are used for different types of minerals and environmental conditions.

Explanation:

The mining method that uses terraces in very deep holes to extract resources, such as iron and diamonds, is open pit mining (c). Open pit mining involves digging a large hole or pit in the ground and creating terraces along the sides of the hole, which allows miners to move deeper into the earth to reach the ore deposits. This method is distinct from strip mining, which involves removing the earth's surface in strips to extract coal or other minerals lying close to the surface. Placer mining refers to the process of mining for minerals by washing away dirt and rock to uncover valuable resources, typically gold. Mountaintop removal mining, as mentioned, is a technique that uses explosives to remove the tops of mountains to access coal seams without the need for underground mining operations. Lastly, subsurface mining involves digging tunnels or shafts into the earth to reach ore deposits that are too deep for surface mining methods.

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