alleryIron ore became a resource only when people learnt to:
APaint it brightly
BWeigh it exactly
CSell it abroad
DExtract iron from it
Answer & Solution
Correct answer: D. Extract iron from it
1. Natural substances become resources when their form is changed.
2. Iron ore was not a resource at first.
3. It became one when people learnt to extract iron from it.
_Source: syllabus Geography, Ch 1 'Resources' (hess401)_
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