All the following are examples of minerals, except timber.
The correct option is d, timber.
What are minerals?
Minerals are solid chemical compounds that have fixed or definite chemical compositions.
Some minerals are calcium, phosphorus, bauxite, iron etc.
Our body needs a very little amount of minerals for the boy's growth.
Timber is wood, which is not a mineral.
Thus, the correct option is d. timber.
Learn more about minerals, here:
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