Question

which is a type of mining where overburden is stripped and coal is removed?
hall mining
placer mining
leach mining
strip mining

Explanation:

Strip mining is a surface mining method where overburden (the layer of soil and rock above the coal or mineral deposit) is stripped away to access the underlying coal or minerals. Hall mining is not a standard mining term. Placer mining involves extracting minerals from sediments. Leach mining uses chemical solutions to extract minerals.

Answer:

strip mining