Here are the correct descriptions assigned to each type of mining:
- Underground Mining: the drilling deep into the earth to collect ores and minerals
- Open-Pit Mining: the collection of ores and minerals close to the earth surface removing large portions of the surface at a time
- Placer Mining: the removal of minerals from alluvial deposits and stream beds
- Strip Mining: the collection of ores and minerals close to the earth surface removing narrow portions at the surface at a time