Question

when does a thing become a resource?
In a word and phrase​

Answer 1

Things become resources when they have a value. A resource gains it's value by how it used or their utility.

Answer 2

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Things become resources when they have a value. A resource gains it's value by how it used or their utility. For example-- water is used for drinking, food is used for eating, pencil is used for writing etc.

Above given examples have their own value which makes them a resource.