Answer :

Final answer:

Subsurface mining involves digging tunnels and passageways to access underground mineral deposits.

Explanation:

Subsurface mining is a method of mining used to extract minerals and resources that are located underground. It involves digging tunnels and passageways to access the ore or mineral deposits. Some of the different types of passageways that must be dug in subsurface mining include:

  • Elongated basin
  • Small pit
  • Groove
  • Passage in bone
  • Slit through bone
  • Hole through bone
  • Opening into canal
  • Air-filled space in bone

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