Question

which type of mining is an example of subsurface mining (mining that is done far below the surface of the earth)?
below - ground long wall mining
surface mining
mountaintop removal
surface strip pit mining

Explanation:

Below - ground long wall mining is a method where mining occurs far below the earth's surface. Surface mining (including mountaintop removal and surface strip pit mining) happens near or on the earth's surface.

Answer:

below - ground long wall mining