Question

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

Explanation:

Strip mining involves removing overburden (surface - layer materials) to access coal or other minerals. Hall mining is not a standard mining term. Leach mining uses chemical solutions to extract minerals. Placer mining focuses on minerals in sediment. Strip mining directly matches the description of stripping overburden for coal removal.

Answer:

strip mining