Hi, there! :)
Answer: Surface mining would be the best type of mining to remove copper ore from a mountain. Surface mining involves removing the overlying rock and soil to access the ore beneath.
This method is typically used for shallow deposits and is less expensive and less dangerous than underground mining. Copper ore is often found near the surface and is therefore most commonly mined using surface mining techniques. Modern mining techniques generally refer to advanced technologies used to improve the efficiency and safety of both surface and underground mining, but the specific type of mining method used would depend on the characteristics of the deposit being mined.
Hope that helps! Good luck! ^_^