Question

The technique that miners were using to dig gold from the ground between 1860 and 1890.
Hydraulic
Strip
Highwall
Open pit

Answer 1

The technique that miners were using to dig gold from the ground between 1860 and 1890 is **Hydraulic mining**. This method involved using high-pressure jets of water to dislodge rock material or move sediment, making it easier to extract gold from the gravel.