An ore is best defined as "rock dug out from the deep inside earth and refined." Ores are mineral deposits that contain one or more valuable minerals that can be extracted and processed for metals or other materials.
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.
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