Metals are found in rocks, either in their ,begin underline,unalloyed,end underline, state or mixed with other metals. If there is enough metal in a rock to make it worth our while to get it out, we call the rock ore, "iron ore," or "copper ore," for example. These ores are found either on the surface of the ground where they can be ,begin underline,obtained,end underline, easily or in veins and deposits underground where they must be mined.
Question
What does the word ,begin emphasis,unalloyed,end emphasis, mean in this paragraph?
Answer options with 4 options
1.
pure
2.
undamaged
3.
equal
4.
perfect