SANTIAGO Aug 31 A Chilean union that represents copper mine workers on Monday rejected a move to drastically cut staff at the El Abra mine owned by Freeport-McMoRan and was considering action after 700 workers had their jobs terminated at the weekend.
Take context from the input text and decide on the accurate relationship between 'El Abra mine' and 'copper' from the options provided.
Options: distribution format, product/material produced, manufacturer, location of formation