Question

which statement defines an ore? rock broken down to become part of the topsoil. rock dug out from the earth to use in construction. rock dug out from the deep inside earth and refined. rock exposed as a result of loss of topsoil.

Explanation:

An ore is a rock that is mined from deep - inside the earth and contains valuable minerals which are refined to extract the useful substances. The first option describes rock becoming topsoil, the second is about construction - use rock, and the fourth is about exposed rock due to topsoil loss. Only the third option correctly defines an ore.

Answer:

Rock dug out from the deep inside earth and refined.